The laser beam uses high heat to melt the surface of the material. Power light and AC/DC light. Be sure to cut out the part that you want to be etched on the glass. Draw your message on stencil paper using a scriber or other sharp point, then place the stencil on your metal marking surface. Third type stencil can be made an ordinary typewriter or dot matrix printer. How to etch your Logo into your knife. There is one image per stencil. 4 White Developer Sponges. 77 per stencil, your money ($0. JavaScript seems to be disabled in your browser. ARKM's Saltwater Etching Tutorial (Stencil Method) Use scissors or a hobby knife to cut out the outside shape of the design. Detailed Acid Etching With a Stencil: This will be a more advanced how-to with using heat transfer stencils to create intricate designs for acid etching. 49 for 16 oz. By using an etchall® swivel knife, you ensure that your stencil edges will be smooth and sharp. Los Angeles, California. Electrolyte Etching Chemical are plays a vital role in electro chemical etching process where the image of a stencil is transferred to an electrically conductive product by the action of electrolyte and electricity. Chris Crawford August 2003. Loading Unsubscribe from Chop Knives? How to Electro Etch a Knife - Duration: 7:42. Check out this easy to make Knife Necklace crafted from 300 series stainless steel. 1PC 220V HNW-300 Electrochemical Etching Machine Marking Pattern. 003" of an Inch in Less than 30 Seconds or Mark the Hardest Tool Steel and Carbides almost Instantly. Includes marker unit with electrical cord, ground plate, chemical solution and special stencils. Chem Etch Manufacturing is the leading manufacturer of anti-theft marking products for the auto aftermarket industry. Electro-Chem Etch Process Picture #1 - Materials for etching assembled: etching machine, cleaner, etchant liquid, knives, electrode wrapped with felt cloth and stencil. Electro-Chem Etch invented the SF 200 in-house electro etching stencil system. Armour Etch Over N Over Reusable Stencil Set Containing- Upper Case, Lowercase, and Berry Floral (Original Version) 4. Easy-loading cartridge tape widths of 18mm, 24mm and 36mm are available to work with small-footprint thermal stencil printers up to 360 dpi. The base of these stencils consists of very fine non-woven fibers in a random orientation which permits the highest degree of detail of any electrochemical marking stencil. These custom vinyl cut stencils are perfect for knifemakers and bladesmiths to electro-etch your logo or makers mark into your knives. You should get several dozen impressions from one stencil. 4 White Developer Sponges. Knife Etching Stencils - Knife Etching. 176-180 5th Ave. If you have any comments or questions, feel free to email me. Customer's Personal Stencil Addition Blue Lightning Tips Etch logo into Damascus Etching Power Supply. The stencil can be used multiple times without degredation and to withstand higher power during an etching process. 0001" up to 0. question on making photo emulsion stencils for etching i finally broke out my marking methods 300 series electro chem ectcher for the first time today, excited as hell to finally be able to use this thing, i cant stop thinking how good it would be to be able to deep etch my logo and customers logo's into my parts!. And I bought a PC-connected labelmaker (Brother PT-P700) for $76 - both on Amazon. All are done with my $20 homemade etcher using a 10% solution of radio shack PCB etch (ferric sulfate) solution. This feature is not available right now. You've got it working! Yes, it needs to be the correct polarity to do the ionic exchange and remove the metal. Put a substantial coat of glass etching cream over your stencil. 050″ part identification characters onto BOLT HEAD per marking specification MIL-STD-130. he likes his Becks Dark beer from a bottle) and think of his three kids and two grand babies with every sip. They make a lot of vinyl stencils for people who do acid etching on glass, and yes you could probably use this and etch with acid, have not bothered as electro etching is cleaner and safer. I had a customer in Kentucky a few years back who insisted that it worked better for her than the dedicated 10mil stencil made for glass etch work because of its excellent conformability on compound curves. Plug the leads into the box and you have yourself an electro-etching unit. Next Place Tray In The 440 Dura-Film Stencil Maker And Turn On Exposure Unit For About 3 Minutes. Reusable Stencil Adhesive: Make Your Own Etching Stencil or Re-spray Old Stencils Posted on June 1, 2018 by Eric Robert Posted in Blog Content 10 Comments I thought this would be a great idea to share because some folks aren't familiar with this product: a repositionable stencil adhesive spray. The only problem is that it is a one-time use. Let the etching cream sit for 5-10 minutes (I personally like to wait 10 minutes for a darker etch- but 5 is sufficient). Stencils are produced using PC software with a 300dpi thermal printer with a standard stencil width of 106mm or 210mm. I think I average 40 to 50 knives per stencil. I dunked a knife blade in candle wax, then scratched my initials in the candle wax. Lectroetch MK1 Etching Machine Now it's both easy and affordable to add tour logo or makers mark to your blades with a an electrochemical etching machine made for knifemakers. Knife Etching Stencils. Impressions can be made to the stencil easily and economically with a typewriter, dot-matrix printer, or metal die. Quality art supplies with FREE DELIVERY* available on paints, oils, canvas, furniture, crafts, tools & equipment. The Laser Etching Process. By a sheet of paper, I could be wrong though, but you might message them and ask for Patricia, she has experience helping knife makers, as she was the one who helped me and I've read where she helped others. 5″ by 11″ (US Letter / A4) sheet of Vinyl sticker stencils. Always wear rubber gloves and goggles to protect your skin and eyes while acid etching. Our products have been used on oil field equipment, government items and more. Electrochemical Etching By comparison, the electrochemical etching method requires nothing more than a battery, some wire, a bowl and common household salt in solution with water. he likes his Becks Dark beer from a bottle) and think of his three kids and two grand babies with every sip. All of our stencils are made for Duracoat, Cerakote, Gunkote, Krylon and spray paint. 95 TODAY! Please Specify Laser or Inkjet Transparency Sheets: Kit Contains: Includes Everything in MARK 440 UV Stencil Maker Kit PLUS the Etch-O-Matic Starter Kit. You might get a hundred impressions if you don't burn your etches too deeply and you clean them up properly. This machine is used by beginners and professionals to mark any unpainted metal surface. My Cut has been everything I needed it to be, and now its a laser cutting and laser system too. Smooth out any bubbles or creases. These are still used for making fabric-painting stencils, and by custom-car airbrush artists. Check links below! Thanks for watching! Email [email protected] You can etch before you strip if that's what floats your boat. Have a logo, design, clipart, artwork or other image you need turned into an easy to use spray paint stencil? We are here to help! Our skilled art team turns your logo, adding the necessary bridges and connections, to make it work with spray paint, brush paint or roll on. Etching a blade with custom stencils Chop Knives. An output of 300W leads to clearer and faster marking. Even though this is often referred to as etching, we do not use acids or other. Los Angeles, California. The SF 200 allows you to use your computer and laser printer, along with our stencil material and rust free etching electrolyte developing solution, to create electro marking stencils in your own facility. This method isn’t nearly as professional looking as an electro etcher or stamp but it works well for those of us on a budget. Steel Etching and Marking From a DC Adapter: As a knifemaker, I like to etch my logo into my knives. I sent them this hallmark (which is about a 12mm wide in real life): Their quoted price for "dura-film" stencils of this mark is $14. Ask us about NanoPlate™ for your next order. This machine is used by beginners and professionals to mark any unpainted metal surface. 95 : FER1 Ferric Chloride - Damascus Etching Solution (CAN ONLY BE SHIPPED GROUND) $16. The company that makes the Etch-o-Matic electrochemical etching system will make custom stencils. Metal etching can be done in a variety of ways. X-Acto knife If the material you're transferring to can be cut, attach your printed design to it, then trace the design's lines with an X-Acto knife cutting a copy of the lines into the surface underneath; Metal photo-etching With a photo etching kit, a chemical bath cuts your stencil out of metal. Monument Stencil Equipment When you need etching equipment, turn to GranQuartz! From granite etching tools, to stone etching kits, to concrete etching tools, we have a wide array of high-quality stone etching tools and kits for any and every application. Colt Sporter Target Model Stencil $16. Electro-etching is the. HARD Felt Knife Honing Wheel Leather Stamp Custom Logo. The Electrochemical Etching station is often used in small to medium production of aerospace components where tight tolerances over surface treatment. 95 : ETCH11 Electro Chem Personalizer - AMC Cleaner : $16. Technologies is a specialist for permanent marking of metals and other technical materials. Custom Leather Stamps. I really enjoy etching glass with and using my Cricut to create stencils to etch the glass. These are still used for making fabric-painting stencils, and by custom-car airbrush artists. On Metal Steel 0. A Dot Matrix 6 Direct Part Marking - Implementation Guide Issue 1 June 2004 - Vcom 9897. Comes with a supply of ECEO1, ECEO4 etching solutions, ECAMC cleaner and a 2' stencil roll, and pads. Round Stencil Paint Brushes - 6 Piece Set price $4. After printing, the stencil is automatically cut to size. If you look at the Martronics website ( www. cotton ballls Clean the part and apply the stencil. Knife Engraving. Ron makes an etch machine for a reasonable cost that has good word of mouth support on the various knife forums. when my dad married my stepmonster he bought her a buick regal. If you don't have a stencil, cover the glass with a plain white contact paper and place a carbon paper on it. Put a substantial coat of glass etching cream over your stencil. Make a design on-line or upload one from your pc. Remember, the part that you will be etching is the part that you are cutting out. Find out how your Cricut to create stencils for glass etching. Then be sure to visit the other blogs in the hop and comment to win. At TYKMA Electrox, we provide our customers with the best technology, which is why we offer the most advanced laser marking, laser engraving and laser etching machines in the world. T Stencils is available from Knife Machines and Tools (KMTs). If you look at the Martronics website ( www. Minimal up-front investment to create quality, re-usable stencils for electro-etching metal. It plays a vital role in electro chemical etching process. Noiseless and heatless. Apply a thick layer of the cream. In the glass, stir 1/2 teaspoon of salt into 1/2 cup of water. Once you etch the glass, the frosted glass will appear lighter-- so make sure you're cutting out the right part. Be sure to cut out the part that you want to be etched on the glass. It’s best to spray the stencil inside of a box so you don’t get any over-spray in your work area. It's really hard to say. It involves a salt solution, and a electric current. 7 out of 5 stars 4 £10. This pair can etch wood and leather quite well He's been using it to etch celtic knots onto pieces of leather To do this he's used Inkscape to convert a. You might get a hundred impressions if you don't burn your etches too deeply and you clean them up properly. ACUCUT Ophthalmic Knives are manufactured through fully automated process & THRU ELECTRO ETCHING process. Here Is A Quick Summary On The Etch-O-Matic: SEE HOW EASY IT IS TO ETCH METAL TOOLS, PARTS, INSTRUMENTS PERMANENTLY IN SECONDS. Feb 23, 2018 - Explore micnickerson's board "Knives - Etching", followed by 241 people on Pinterest. Results matching fewer words. Mark 440/Etch-O-Matic Super Kit Combo $349. Follow Us. Do not etch too long at a spot at a time - the etching heats up the steel and this can damage the stencil. Having conducted the experiment, I submit to you… my lab report. Take a 1/4 cup of warm water and dissolve a tablespoon of salt in it. Carried in 4 mil, 7 mil, 10 mil and 14 mil thicknesses and multiple sizes. Plug the leads into the box and you have yourself an electro-etching unit. There are various formulas you can use, as simple as salt water. Metal Marker system is proudly designed and developed in Australia. Since they provide a permanent, high resolution, consistent marking that doesn't fade over time, here are some of the top industrial uses:. Electrolyte - SCE-4 - Pint quantity. Armour Products 341648 Over n ft. Titan-Etch: Easy titanium etching without hydrofluoric acid (HF). I trashed several knives and razors until I got these two marks to come out okayish. Applications include: bearings aerospace parts automotive parts hand tools knives, blades, scissors and other cutting tools The AM25’s robust, corrosion-free construction will provide years of trouble-free electrochemical etching. Electro-Chem Etch Process Picture #1 - Materials for etching assembled: etching machine, cleaner, etchant liquid, knives, electrode wrapped with felt cloth and stencil. Traditionally, etching is a process that uses a strong acid or mordant to create a design on metal surfaces. It marks any Flat or Round Metal Surface down to 1/16" Diameter and any Metal Thickness from Thin Foil up to the Largest Castings easily. Cutting stencils, once you have had a bit of practice, is relatively simple. By using an etchall® swivel knife, you ensure that your stencil edges will be smooth and sharp. As you will notice, this DIYization of electro-etcher/markers has been pioneered by the knife-making community, since they like to electro-mark their creations. I sent them this hallmark (which is about a 12mm wide in real life): Their quoted price for "dura-film" stencils of this mark is $14. Gearing up to place an order, and checking out the free samples as well, and any suggestions are GREATLY appreciated. Colt XM4 Carbine Stencil $16. Step 4: Carefully remove the protective backing from the design. Noiseless and heatless. Colt AR-15 Lightweight Stencil. Refill Kit: Includes bottles of electrolyte and cleaner, a screencloth and 10 stencils: LectroEtch MK1 Etching Kit NCK-MK1: $ 66. Step 4: Carefully remove the protective backing from the design. It is better to use a picking needle or "weeding" needle, shown above. The MK1 kit includes the power supply, enough etching and cleaning solution to do maybe a hundred knives or so ( and you can order more if you run out), ground clip and etching pad and a pack of stencil sheets. Electrochemical etching can produce an etch ranging from less than. They have an adhesive back and can be used one time only. Speaking of nonstandard uses for vinyl, ORACAL 751 can also be used as a stencil film for etching wineglasses. I bought a cheap etching tool which made pretty good marks with AC current only when I first started etching my knives. -Etching is an intaglio process but there are unique differences. Here Is A Quick Summary On The Etch-O-Matic: SEE HOW EASY IT IS TO ETCH METAL TOOLS, PARTS, INSTRUMENTS PERMANENTLY IN SECONDS. 49 Quick view. ACUCUT Ophthalmic Knives are manufactured through fully automated process & THRU ELECTRO ETCHING process. Then, I applied the etchall® etching creme very thickly with the edge of a plastic knife. You may be familiar with the technique of electro-plating, where a metal object is plated with a layer of another metal by placing it in a bath with a source of plating metal and running current through it. Basic glass etching supplies are: etching cream, a squeegee, a foam brush, the stencil of your choice and a pair of disposable gloves. Rub up and down and side to side. Use a razor knife to cut out the stencil. To start etching you need a 12 volt DC source, two-lengths of wire with alligator clips, table salt, white vinegar, cotton swabs, and sticky stencils. Stencils are produced using PC software with a 300dpi thermal printer with a standard stencil width of 106mm or 210mm. 3 Process Flowchart After all blank fields are filled this will automat Switch on power to Pryor ECE system Enter part number Screen fields will change to reveal field names rel Enter Data into field’s e. The process I used for etching my logo on blades is called Electro-Chem Etch. To actually etch a design in a piece of metal, simply place the piece on a metal plate, put the stencil down, and hold a felt-covered electrode moistened with electrolyte down over the stencil. If this is a problem for you, you should be really careful when wrapping it, and maybe try submerging it in clean water first ;-) But in my case, it’s on the inside and nobody will ever notice. Just be super gently at this step, it’s all about a soft touch and patience. It’s inexpensive, you can make super large stencils and you can cut whatever design you like using an X-acto knife. You should get several dozen impressions from one stencil. Apr 26, 2020 - Explore CustomIDEAs's board "Etching", followed by 373 people on Pinterest. Please note that we publish detailed product information and prices in. It’s best to spray the stencil inside of a box so you don’t get any over-spray in your work area. Stencils Stock Brass Sets Oilboard Sets ABS Handicap Stencils Parking Lot Stencils Custom Lettering and Graphics Oilboard Mylar (Polyester Film) ABS Magnetic Sheet Polyethylene Stainless Steel/Aluminum Supplies Stencil Machines Inks and Brushes Rubber Stamps Hand Stamps Self-Inking Stamps Techstamp Pre-Inked Stamps Numbering Band Stamps. It's a heavy SOB and would/will be expensive to ship. Print on Demand Disposable Stencils. Etching is accomplished by an etchant and a DC current using a stainless steel cathode, the work is the anode. Damascus Knife Blade Etching Instructions Etching Damascus is a fairly stright forward process that can enhance the appearance of a blade or help you recover from a mistake. Checkout the other. Let the spray dry somewhat – just so it’s not really wet. 95 : ETCH11 Electro Chem Personalizer - AMC Cleaner : $16. It marks any Flat or Round Metal Surface down to 1/16" Diameter and any Metal Thickness from Thin Foil up to the Largest Castings easily. Includes all the materials you will need to begin Electro Chemical marking of your parts. Clean the knife to be free of oil, grease, wax etc. Refill Kit: Includes bottles of electrolyte and cleaner, a screencloth and 10 stencils: LectroEtch MK1 Etching Kit NCK-MK1: $ 66. MU Knives 126,242 views. I had them cut a sheet of stencils, cost R1. Place a handful of cotton swabs into the saltwater solution to soak. Colt ArmaliteAR15 Model 01 Stencil $16. Bowies page 1 Bowies page 2 Lockback Folders Links Tutorials Stabilized Leather Moose Antler Stabilize. This method isn’t nearly as professional looking as an electro etcher or stamp but it works well for those of us on a budget. etching of stainless steel will remove material and alter the surface. Etch from 0. It is clear and VERY sticky. Get hold of a self-adhesive glass etching stencil. How to Make a Stencil. 95 : ETCH11 Electro Chem Personalizer - AMC Cleaner : $16. Photo Etch Technology is proud to introduce our new solution for stencil coating. Smooth out any bubbles or creases. Just peel away the backing and place the stencil on your part to begin marking. Mythtaken, Apr 26, 2012. For the developing process, follow these steps - repeating if necessary. Electrolyte Etching Chemical are plays a vital role in electro chemical etching process where the image of a stencil is transferred to an electrically conductive product by the action of electrolyte and electricity. Related content Fabrication of polymer nanowires via maskless O2 plasma etching Ke Du, Ishan Wathuthanthri, Yuyang Liu et al. Manufacturers who produce nearly anything from Fine Cutlery to Saw Blades and Aerospace Components prefer this method of permanently identifying their parts. You can also just buy the film, some developer and make your own light box to expose the film. Easily and quickly does. Discussion Starter • #1 • Dec 29 Stamping is a possibility but I'm also wondering if electro etching with saltwater might produce better results. Its would have to be adhesive but not permanent, but also be fairly easy to remove from the backing with the transfer sheet. made in USA. it is ideal for reproducing trademarks, part and serial numbers, measurement markings, inspection stamps. Electro Etching with Saltwater Stencil. Make sure each letter is completely covered with a fair amount of cream. The printer is also connectable to PC and smart devices via USB and WI-FI. Clean the surface to be etched with water or alcohol. -Minimal pressure is used for the depth of the line in etching - Etchings will have more of a rubbery texture-A chemical process does the rest by: 1. I have done primative Electro-etch engraving before with a car battery charger. 3 Process Flowchart After all blank fields are filled this will automat Switch on power to Pryor ECE system Enter part number Screen fields will change to reveal field names rel Enter Data into field's e. This is mainly because I etch the blade as one of the final steps, and I hate having to go back to hand sanding a blade again if something goes awry during etching. Our products have been used on oil field equipment, government items and more. The limitation of this type of stencil is that, of necessity, it must be fine line. The frames fit the stencils holders of all known machines for electro-chemical etching. I have been making knife etching stencils for people all over the world for several years now. Loading Unsubscribe from Chop Knives? How to Electro Etch a Knife - Duration: 7:42. Electro-Corrosion Marking Machine Electrochemical Etching Machine 220V 0. Use a rubber band to wrap the etch pad around the metal or carbon end of your etch lead. when your done clean the stencil with running water (DON'T rub the stencil, you can destroy it pretty quick like that) and spray the blade down with windex to neutralize the etch. The melted material expands and causes a raised mark. Once you etch the glass, the frosted glass will appear lighter-- so make sure you're cutting out the right part. The etcher to the negative. To start etching you need a 12 volt DC source, two-lengths of wire with alligator clips, table salt, white vinegar, cotton swabs, and sticky stencils. 8 oz bottle of Armour Etch Cream; Assortment of Rub N Etch Stencils; Stencil vinyl 3x3 in for custom stencil cutting; Stencil cutting knife; Camel hair brush; One pair of re-usable vinyl gloves; Stencil applicator stick; Illustrated full color instructions; 3-1/2" x 3-1/2" piece of practice glass for your first glass etching project. At TYKMA Electrox, we provide our customers with the best technology, which is why we offer the most advanced laser marking, laser engraving and laser etching machines in the world. Make sure that you cover an area that's fairly large compared to the size of the etch you're wanting to do. Check links below! Thanks for watching! Email [email protected] Every attempt at another stencil has failed, can never get both inside and outer portion of graphic to develop correctly. 00 : ETCH1 Electro Chem The "Personalizer" $204. 2 FREE Sample TEST Stencils (for practice) Complete Instructions; 1 Sample Glass Etching Kit with Etching Cream; MARK 680 STENCIL MAKER (Makes Stencils Up To 6"x8") Industrial Price $329. These custom cut vinyl knife etching stencils are perfect for knifemakers and bladesmiths to electro-etch your logo or makers mark onto your knives. The biggest issue for me has been difficulty in keeping excess electrolyte from leaking off around the side of my stencil and leaving unwanted marks. The speed of the etch, which is 3 seconds total and the quality of the etch which so far seems to be superior to knives I have had lasered has meant it was well worth it. electrical source, I used a car charger. Use tape to hold it flat and in. The Electrochemical Etching station is often used in small to medium production of aerospace components where tight tolerances over surface treatment. cdr ) file type, size is 28. we supply several types of stencil which will vary to best suit the marking application. Put a substantial coat of glass etching cream over your stencil. The stencil vinyl isn't the same stuff as the decorative Silhouette vinyl. Martronics Corporation is an expert in etching and marking metal, multi-tools, craft-stencils with paint, and making rubber stamps. Electrochemical marking is electrochemical etching of metal surfaces using a small amount of electric current. The frames fit the stencils holders of all known machines for electro-chemical etching. First I sprayed the back of the stencil with the stencil spray. How I make my stencils for etching my makers mark. It plays a vital role in electro chemical etching process. I´ve had 2 other sets made by TUStech. I can print custom stencils on the spot, with logos, fonts, artwork, whatever. If you plan to cut stencils from poster board or any material that is somewhat absorbent, use a sealant or waterproofing chemical. Electrochemical marking can be used to mark hardened, thin, or already assembled metal parts. The positive is attached to a swab. You should get several dozen impressions from one stencil. Designed for chemical etching (with Armour Etching Cream), mirror removing, sandblasting, painting and staining of glass, mirror, tile, metal, granite and other non-porous surfaces. They are made from vinyl decal material used for signage. There is one image per stencil. ⁠ ⁠ #WeaponStencils #DontSettleForFactory #BoringToBadass #bitchiapplicate #cerakote #duracoat #gunkote #powdercoat #rifles #customguns #stencilart #airbrush #paintball #airsoft #gunmeme #gunmemes. bottle of Armour Etch Cream, 85 Glass Etching Stencils, custom stencil vinyl, design patterns, stencil cutting knife, Camel hair brush, one pair of re-usable gloves. There is a way to do this with vinyl lettering companies. Monument Stencil Equipment When you need etching equipment, turn to GranQuartz! From granite etching tools, to stone etching kits, to concrete etching tools, we have a wide array of high-quality stone etching tools and kits for any and every application. Print on Demand Stencil material is slightly more robust but similar to BRSK instant stencils. Impression stencils are usually designed for low volume runs. Create your own stencils using a standard typewriter, ball point pen, or scribe and our convenient stencil roll. Our Master Oscillator Power Amplifier (MOPA) fiber laser technology has the capability to mark, engrave or etch on a variety of surfaces and materials, unlike other fiber lasers that often have trouble processing. The stick-on vinyl stencils reduce paint bleed and are easy to use. ETCHES MARK INTO SURFACE — ETCH-O-MATIC will Etch into the surface of Anything made of Metal, including Tools, Instruments, Equipment or Manufactured Parts, anything that can be Typed, Written, Drawn or Photo Processed on a Special Stencil. Have you ever done any glass etching? Well, neither had I before today. 00 worth ($21. HARD Felt Knife Honing Wheel Leather Stamp Custom Logo. Let her expert tips get you started. Now everyone has an opportunity to etch designs using mylar stencils. Watch him in time-lapse action!. 49 Quick view. I had them cut a sheet of stencils, cost R1. Plug the leads into the box and you have yourself an electro-etching unit. Flexible and translucent, Oramask 810 stencil film is ideal for making stencils for wall designs, signs & more. Mark surfaces with handwritten messages, designs, or logos. I clean between each etching but they do tend to deteriorate and then you have faint lines around etching. The etching process should be cool. Includes: Personalizer Machine Etch Block 2 small bottles of Etctrolyte (SCE-1 & SC-E4) 1 small bottle of AMC Cleaner Pack of ten Etch Pads Stencil Samples Instructions The best Electrochemical Etching Machine available, the Personalizer will etch your Maker's Mark fast, with amazing accuracy and on any unpainted metal. Making Stencils from Contact Paper I’ve decided that making stencils from contact paper is the only way to go for certain stenciling projects. The basics of the process are very simple. All the equipment is modular enabling a system to be built to suit your exact needs. You may be familiar with the technique of electro-plating, where a metal object is plated with a layer of another metal by placing it in a bath with a source of plating metal and running current through it. We offer unique and custom stencil designs for your firearms as well as stickers designed to affix to your weapons, magazines and accessories. It would work for an anodizing power supply as well. This unique stencil system can be used to mark/etch or plate stainless with what you need marked at the press of a few buttons once the unit is plugged into your computer via a USB port. Monument Stencil Equipment When you need etching equipment, turn to GranQuartz! From granite etching tools, to stone etching kits, to concrete etching tools, we have a wide array of high-quality stone etching tools and kits for any and every application. Electro-Chem Etch Process Picture #1 - Materials for etching assembled: etching machine, cleaner, etchant liquid, knives, electrode wrapped with felt cloth and stencil. com offers quality gun stencils that allow you to truly customize your rifles, pistols, shotguns, airguns, paintball guns and more! Use our stencils to update the look of your weapon and gun accessories. I chose a stencil by Pam Carriker, Door to Heart 9, a beautiful 9x12 stencil. we supply several types of stencil which will vary to best suit the marking application. The only problem is that it is a one-time use. Glass etching and engraving are easy once you have the right supplies. Impression stencil paper is available in sheets and rolls as well as different formulas. Check out my new and improved etched Trifle Bowl. These stencils are for electrochemical impressions using an etch machine. Please check our section "Glass etching". Click here to see some lovely Rub n Etch flower stencils available at Amazon. Comes with a supply of ECEO1, ECEO4 etching solutions, ECAMC cleaner and a 2' stencil roll, and pads. Related content Fabrication of polymer nanowires via maskless O2 plasma etching Ke Du, Ishan Wathuthanthri, Yuyang Liu et al. Chemical Etching Laser Cutting Electroforming Electroforming, is an additive process whereby the stencil foil is created by electroforming nickel. Stencil module as per request. Simple, fast & safe, the Electro-Chemical Etching Process is actually the reverse of electroplating. Etching leaves sort of a "stamped" look on the blade. com offers quality gun stencils that allow you to truly customize your rifles, pistols, shotguns, airguns, paintball guns and more! Use our stencils to update the look of your weapon and gun accessories. The etching process itself is quite simple. Mark surfaces with handwritten messages, designs, or logos. I converted my battery charger and made an Electro etching machine for my knife blades. For this process, you can use your stencil knife, but the point can easily break, which can get costly if it happens often. Monument Stencil Equipment When you need etching equipment, turn to GranQuartz! From granite etching tools, to stone etching kits, to concrete etching tools, we have a wide array of high-quality stone etching tools and kits for any and every application. The minimum order for etch solution is a litre, and you need different sorts for black mark on carbon steel, etch mark on carbon steel, and marking stainless steel, I also got a neutraliser and a stencil cleaner. Lay the transferred stencil on the waxed paper on the cutting mat. Knife Making Supplies - Best prices, selection and service. The company that makes the Etch-o-Matic electrochemical etching system will make custom stencils. Today, etching process has been industrialized, masking methods improved, and electric current added to the process to aid in etching corrosion-resistant metals. Easy, inexpensive electro-etching process from Instructables user lasersage appears to give impressive results. I don't know exact proportions, so experimentation is. Removed the paper. I thought about sending it off to get is custom engraved but that seems like a lot of money and time involved. You can get it at a craft supply store or online; and, a squeegee can be purchased at most grocery stores or at your local dollar store. 1972 Forest Ave Pinetop-Lakeside, Arizona. Custom Cut Logo & Text Stencils When looking for the top stencil maker you can’t go wrong with Lazer Designs! We craft custom cut stencils that are sharp and precise every time for the best use on all surfaces. etching of stainless steel will remove material and alter the surface. The stick-on vinyl stencils reduce paint bleed and are easy to use. Check out this short video to see how the Silhouette Cameo cutting machine can be used to create beautifully detailed stencils for metal etching. AM30T Fully Automatic Turntable Marking Machine. In the past, making your own stencils to etch-glass with was time consuming and difficult. These are still used for making fabric-painting stencils, and by custom-car airbrush artists. There are various formulas you can use, as simple as salt water. he likes his Becks Dark beer from a bottle) and think of his three kids and two grand babies with every sip. cdr ) file type, size is 28. 24) had to buy a minimum of R150. A 9V battery will etch just fine with salt water as the electrolyte IF the + of the battery goes to the knife and the - of the battery goes to the Q-tip. Armour Products 341648 Over n ft. Remove the white copy paper stencil, and put aside. Attached one lead of the battery charger to the knife and put the other in a bath of salt water, then dunked the knife blade in the salt water for a couple of minutes. The biggest issue for me has been difficulty in keeping excess electrolyte from leaking off around the side of my stencil and leaving unwanted marks. Blue Lightning Stencil: Price List. The regular size for polyester stencils is 60x220mm, this enables 6 logos of reasonable size. create a stencil with the logo or wording you want. The frames fit the stencils holders of all known machines for electro-chemical etching. dura-film stencils in minutes! DURA-FILM STENCILS Are Very Durable, Long Lasting STENCILS Made With Your Own Artwork, Designs, Logos or Trademarks And Made With Your Own Computer And One Of The Four New Stencil Makers For Use With The ETCH-O-MATIC To Mark Anything Metal Such As Tools, Metal Parts Or Knives!. Peel off the backing of your stencil and place the adhesive film directly on the glass where you want the design. Electrolytic Etching: Also called electro-chemical etching, this is the most common modern method to mark handmade knives, and is also used to mark many factory knives. The Etching Technique. A razor knife or small scalpel will work for simple shapes, but for intricate stuff, it's hard to beat a stencil cutter, which is more or less a kind of low-heat fine-point soldering iron. It produces a sharp, clean, attractive and economical mark. Place a cutting mat beneath the stencil material and then trace the outline with the craft knife. I let it sit for a couple of minutes on a low voltage to etch. I made a stencil from some 651 and covered the rest of the blade with scrap vinyl creating a water tight seal. Although the Mk3 is not a programmable etching machine, it does not lack in power!. Electrolyte Etching Chemical are plays a vital role in electro chemical etching process where the image of a stencil is transferred to an electrically conductive product by the action of electrolyte and electricity. MU Knives 126,242 views. I placed the blade in a salt water solution and attached it to a DC power source. Basic accessories, cord, applicator, felt pads, stencil roll, and electrolyte. 7 S 0 P O N S O A R P A 7 E E D-1-1 U J-1 0 F J-1-1. Peel off the backing of your stencil and place the adhesive film directly on the glass where you want the design. To watch a live tutorial follow The Crafty Blog Stalker on Facebook. Check out this short video to see how the Silhouette Cameo cutting machine can be used to create beautifully detailed stencils for metal etching. They are typically used for oxide or light etch marking. In this work, a common low carbon steel tubing grade STKM 11A with 28. Loading Unsubscribe from Chop Knives? How to Electro Etch a Knife - Duration: 7:42. An Etch-o-matic can't supply the mandatory 10 mils of etch depth I require, I would like a deeper etch than 10 mils if I can get it. There is one image per stencil. 00 Jameco Valuepro 67-1242 Center-Tapped Power Transformer, 24 VAC, 48 Watt, 2 Amps, 2. The etchall® swivel knife makes it easy to cut curves, circles, and round shapes within a stencil pattern. How to Make a Stencil. Custom handcrafted knifemaker stencil Eletro etching knifemaker logos. Reply Delete. from qts, 29x29 23x23 step stencils, mini and micro stencils. Peel stickers off paper and apply to the cleaned and dried glasses. The Total manufacturing technology, process & machinery has been transferred from Germany. I've been experimenting useing Dupont ImagOn photopolymer film as the photoresist. The company that makes the Etch-o-Matic electrochemical etching system will make custom stencils. These custom vinyl cut stencils are perfect for knifemakers and bladesmiths to electro-etch your logo or makers mark into your knives. A razor knife or small scalpel will work for simple shapes, but for intricate stuff, it's hard to beat a stencil cutter, which is more or less a kind of low-heat fine-point soldering iron. In this case you get two stencils, the inner star and the outer star. I-Source Technical Services offers SMT Stencils In an array of custom sizes and styles. he likes his Becks Dark beer from a bottle) and think of his three kids and two grand babies with every sip. These stencils are made of mylar plastic and can be easily cleaned with soap and water. This hobby knife set is ideal for etching, scribing, retouching stencils, layouts, and paste-ups $ 3 99. And I bought a PC-connected labelmaker (Brother PT-P700) for $76 - both on Amazon. The number is etched on the metal, creating a permanent, non-evasive solution. I found a possible source of stencils. 0 results for electro etching stencil. It is a manual machine which is broadly used where less quantity of jobs needed to be marked like marking of Company logos, Serial numbers, Identification number, Barcode etc. (Not glass cleaner, which might leave residue!) Dry with a lint free cloth or coffee filter. Use on glass, mirror, ceramics and other non-porous surfaces. 5mm (use w/hobby knife #1 handle) Airscale 1/48 WWII Cockpit Details (Photo-Etch) Pegasus Chrome Reverse Rims/Tires (4) Plastic Model Tire Wheel 1/24 Scale #1125. The most common issue with etching is the polarity. 99 Quick view Assorted Stencil Sponge Sticks price $2. Its operation is very simple and does not require any particular skills. The MK1 kit includes the power supply, enough etching and cleaning solution to do maybe a hundred knives or so ( and you can order more if you run out), ground clip and etching pad and a pack of stencil sheets. Just peel away the backing and place the stencil on your part to begin marking. Use any 110V AC outlet. It does require etching cream and sticky type stencils. 5mm (use w/hobby knife #1 handle) Airscale 1/48 WWII Cockpit Details (Photo-Etch) Pegasus Chrome Reverse Rims/Tires (4) Plastic Model Tire Wheel 1/24 Scale #1125. Like New, Good condition. • Cleaner transfer of artwork to stencil and easy-release liner increase efficiency in the production process • Easier cutting translates into less wear on knives and cutting dies; increases durability and requires fewer replacements • Stencil construction provides for smooth and accurate tracking. That’s pretty much it. Since 1943, when electrolytic etching was first introduced to the metal working industries, continual research and development have progressed. Serial number. Customer's Personal Stencil Addition Blue Lightning Tips Etch logo into Damascus Etching Power Supply. Electro Chemical Etching gives you the ability to permanently mark products, while achieving etch depths from. Easily and quickly does. Use on glass, mirror, ceramics and other non-porous surfaces. The metal that needs to be etched is connected to the negative pole. 95 TODAY! Please Specify Laser or Inkjet Transparency Sheets: Kit Contains: Includes Everything in MARK 440 UV Stencil Maker Kit PLUS the Super Etch-O-Matic Kit. One slip of the knife and you had to start over. -Etching is an intaglio process but there are unique differences. Using electrochemical technique to mark electrically conductive surfaces. Stencils are one time use stencils and can be used on glass, mirrors, and metal. You can also purchase additional stencils available in 3 sizes - 40 x 71mm, 60 x 100mm, or 100 x 110mm. And an extra tip, the spray nozzle did great for removing the paste in between small areas of the stencil design. Use your craft knife to cut the image out of the contact paper. 00 : ETCH1 Electro Chem The "Personalizer" $204. First I sprayed the back of the stencil with the stencil spray. cotton ballls Clean the part and apply the stencil. If you look at the Martronics website ( www. ) I mentioned last week that quite a few people around here are into …. I had them cut a sheet of stencils, cost R1. Finish your handcrafted masterpieces by permanently etching your work. Chris Gould uses his superior skills with a knife to create a work of art with our how2heroes logo. X-ACTO XW5282E at $20. Although the belt buckle was wrapped in duct tape, the vinegar-salt solution leaked through, which resulted in slight etching on the inside on the buckle. Because of the relatively heavy diameter of the woven fibers of these stencils they are recommended for stencil designs with features that are at least 3/32" deep. Mask off areas that are not to be etched with patterning tape or adhesive-backed stencils. You might get a hundred impressions if you don't burn your etches too deeply and you clean them up properly. Above this (in cross sections below) is felt pad soaked in salt solution (sodium chloride: NaCl) plus a waxy stencil. We have included two video tutorials - although - for editing purposes - the developing process is filmed quicker than normal. Procedure is pretty simple. Mark 440/Etch-O-Matic Super Kit Combo $349. Plug the leads into the box and you have yourself an electro-etching unit. How to easily etch a design onto any knife blade. It marks electrochemically and actually etches mark into surface. The process I used for etching my logo on blades is called Electro-Chem Etch. I made a stencil from some 651 and covered the rest of the blade with scrap vinyl creating a water tight seal. The etching process should be cool. 95 (You Save $80. Press the contact pad to the stencil when etching you need to "degauss" frequently, 3 seconds on, 3 seconds off, repeat until the etch is your desired depth. Refill Kit: Includes bottles of electrolyte and cleaner, a screencloth and 10 stencils: LectroEtch MK1 Etching Kit NCK-MK1: $ 66. Blue Lightning Stencil: Price List. Marking Stencils. Procedure is pretty simple. ⁠ ⁠ #WeaponStencils #DontSettleForFactory #BoringToBadass #bitchiapplicate #cerakote #duracoat #gunkote #powdercoat #rifles #customguns #stencilart #airbrush #paintball #airsoft #gunmeme #gunmemes. Please try again later. Place a handful of cotton swabs into the saltwater solution to soak. If you are trying to get a deep etch in the blade I used direct current (DC), a stencil and the chemical etchant. 25 secs - 4 secs for most sized marks. 00 Off Today's Sales Price (Also, You Will Get a 20% Special. On most metals, you can create either a black or dark mark on AC or a deeper white or frosted mark on DC. Although the belt buckle was wrapped in duct tape, the vinegar-salt solution leaked through, which resulted in slight etching on the inside on the buckle. when your done clean the stencil with running water (DON'T rub the stencil, you can destroy it pretty quick like that) and spray the blade down with windex to neutralize the etch. This machine is used by beginners and professionals to mark any unpainted metal surface. Metal is eaten away where there are holes in stencil. We cover a broad range of technologies such as electrochemical etching, laser marking, sandblast marking, imprinting, (glass) etching, dot peening, stamping, and engraving. Compare to. bottle of Armour Etch Cream, 85 Glass Etching Stencils, custom stencil vinyl, design patterns, stencil cutting knife, Camel hair brush, one pair of re-usable gloves. After buffing with the JB and cleaning with acetone, the logo is finished and looks like this. Place the stencil on the water bottle. A razor knife or small scalpel will work for simple shapes, but for intricate stuff, it's hard to beat a stencil cutter, which is more or less a kind of low-heat fine-point soldering iron. 0 results for electro etching stencil. Use impression stencils when the numbers or letters in the marks constantly change. Please contact me for a price quote! I will set up a Paypal invoice for you. Stencils and Printers for Electrolytic Marking & Etching. 00 On The Mark 440 And $50. The cutlass stencil cutting pen tool is a professional grade cutting device specially designed to cut mylar stencils, polyester, acetate and most plastics. Stencils Stock Brass Sets Oilboard Sets ABS Handicap Stencils Parking Lot Stencils Custom Lettering and Graphics Oilboard Mylar (Polyester Film) ABS Magnetic Sheet Polyethylene Stainless Steel/Aluminum Supplies Stencil Machines Inks and Brushes Rubber Stamps Hand Stamps Self-Inking Stamps Techstamp Pre-Inked Stamps Numbering Band Stamps. Let sit for 15 minutes. I have done primative Electro-etch engraving before with a car battery charger. I bought a cheap etching tool which made pretty good marks with AC current only when I first started etching my knives. Nickel stencils offer unsurpassed durability and paste release. They make a lot of vinyl stencils for people who do acid etching on glass, and yes you could probably use this and etch with acid, have not bothered as electro etching is cleaner and safer. Delphi Tip: Etching and engraving creates a delicate frosted surface. Ron is well known in the knifemaking community for his hydraulic forging presses and etching machines. I have a pretty fancy machine to do this, however others have asked about etching and marking so I came up with a fairly straight-forward device that one can make for around $20. The most common issue with etching is the polarity. ACUCUT Ophthalmic Knives are manufactured through fully automated process & THRU ELECTRO ETCHING process. Picasso always signed his work, so should you!. Multiple etchings with identical stencil patterns. Technologies is a specialist for permanent marking of metals and other technical materials. Use tape to hold it flat and in. i etched rosemarie. Now everyone has an opportunity to etch designs using mylar stencils. Impression stencils are usually designed for low volume runs. My stencils are carried out by Framark company from a JPEG file. American Made in Brea California,Etches deep into the steel, aluminum, or most anything metallic. Apply masking tape around the stencil. Cut the printed stencil with an Xacto knife. Laser Etching / Laser Engraving / Laser Marking 0. Bottle Stencil Developer, plus Developing Tray w/Lid. The polarity is reversed from that used for electroplating. Steel Etching and Marking From a DC Adapter: As a knifemaker, I like to etch my logo into my knives. In my last post, I shared a technique that I learned on a recent jewellery making holiday for etching dichroic glass to make pretty fused glass pendants. Use a rubber band to wrap the etch pad around the metal or carbon end of your etch lead. They are typically used for oxide or light etch marking. By using an etchall® swivel knife, you ensure that your stencil edges will be smooth and sharp. I think I average 40 to 50 knives per stencil. 003" of an Inch in Less than 30 Seconds or Mark the Hardest Tool Steel and Carbides almost Instantly. Use thin crafts, linoleum, or wood-cutting knives to carve the pattern. Monument Stencil Equipment When you need etching equipment, turn to GranQuartz! From granite etching tools, to stone etching kits, to concrete etching tools, we have a wide array of high-quality stone etching tools and kits for any and every application. To transfer the message, wet the pad on the etcher with etching solution and press it over the stencil, then touch the grounding wire to your marking surface to activate the solution. It is better to use a picking needle or "weeding" needle, shown above. 00) This gave me almost 100. Use the printer to create quality single-use stencils - 0. 1 Digital Timer. 24) had to buy a minimum of R150. Use an Exacto knife to remove the part that you want etched into the design. I wanted something better that would make a sharper deeper etch so I bought the "Personalizer" which worked better but still now exactly what I wanted it runs at 12 volt and has DC current for etching and Ac for marking in blaCK. Laser Etching / Laser Engraving / Laser Marking 0. Stencils Stock Brass Sets Oilboard Sets ABS Handicap Stencils Parking Lot Stencils Custom Lettering and Graphics Oilboard Mylar (Polyester Film) ABS Magnetic Sheet Polyethylene Stainless Steel/Aluminum Supplies Stencil Machines Inks and Brushes Rubber Stamps Hand Stamps Self-Inking Stamps Techstamp Pre-Inked Stamps Numbering Band Stamps. DIY Easy Knife Making, learn how to etch a name or logo onto any knife blade. When you are finished etching, remove the sticker. Followers 1. There is one image per stencil. All are done with my $20 homemade etcher using a 10% solution of radio shack PCB etch (ferric sulfate) solution. Let resist gel dry until completely clear. If you use something like the etch-o-matic, and have a decent laser or ink-jet printer, you can make your own. IMG is the original Electromark Company, one of the creators of the electromarking process. Pumpkin carving gets a makeover with this etching technique from a master. Finish your handcrafted masterpieces by permanently etching your work. Glass etching and engraving are easy once you have the right supplies. Includes: Personalizer Machine Etch Block 2 small bottles of Etctrolyte (SCE-1 & SC-E4) 1 small bottle of AMC Cleaner Pack of ten Etch Pads Stencil Samples Instructions The best Electrochemical Etching Machine available, the Personalizer will etch your Maker's Mark fast, with amazing accuracy and on any unpainted metal. AND when you etch with a mylar stencil, you can re-use the stencil mutiple times - just like the creme and the dip! This is the first sample I tried on a 5" x 7" piece of glass. The stencil is made from a coloured permeable fabric with a thin non-permeable laminate surface on one side of the stencil. Picture showing: Description: 1. Los Angeles, California. Its would have to be adhesive but not permanent, but also be fairly easy to remove from the backing with the transfer sheet. Cut completely through solid lines. Finish your handcrafted masterpieces by permanently etching your work. Acid Etching in Texas. This electrochemical etching process will give you a high quality, stress-proof, permanent mark on any metal part. Schematic of an electroetching unit A unit of electrochemical etching is finally a power supply that have AC or DC voltage. ingredients: mirror or piece of glass, 1 sheet 8. Photo sensitive stencil for electro etching Sign in to follow this. Joined Mar 9, 2003 · 3,085 Posts. Draw your message on stencil paper using a scriber or other sharp point, then place the stencil on your metal marking surface. Here are the steps involved in etching a reed. Colt ArmaliteAR15 Model 01 Stencil $16. Whether you are a beginner or experienced artist, in just a few minutes time this easy-to-use glass-etching course will have you creating professional quality permanently etched designs you can use to personalize and decorate your household glassware, windows. You should get several dozen impressions from one stencil. Make sure that you cover an area that's fairly large compared to the size of the etch you're wanting to do. Each stencil is good for approximately 2-3 marks. There is no external force required to make an indentation or mark. If you look at the Martronics website ( www. Place your stencil exactly where you want it on the knife. Above stencil worked once on second try it was a total failure. Paint a light layer of the frost etching paint in the stencil that you have cut out of the sticker paper. It’s best to spray the stencil inside of a box so you don’t get any over-spray in your work area. Shawnba67. Electrolytic etching is a technique where electric current is used to remove metal from a substrate, in our case a steel knife. METAL PHOTO ETCHING PROCESS. Refill Kit: Includes bottles of electrolyte and cleaner, a screencloth and 10 stencils: LectroEtch MK1 Etching Kit NCK-MK1: $ 66. Electrochemical marking can be used to mark hardened, thin, or already assembled metal parts. After it’s set, peel the stencil away and clean the cream off. I hope you have enjoyed this tutorial. he likes his Becks Dark beer from a bottle) and think of his three kids and two grand babies with every sip. If you have a black and white image that you want to etch into your knife like your initials, I ran the stencil over with my pickup truck and got the same image etch result. cdr ) file type, size is 28. I dunked a knife blade in candle wax, then scratched my initials in the candle wax. Step 4: Carefully remove the protective backing from the design. Although the belt buckle was wrapped in duct tape, the vinegar-salt solution leaked through, which resulted in slight etching on the inside on the buckle. ETCHES MARK INTO SURFACE — ETCH-O-MATIC will Etch into the surface of Anything made of Metal, including Tools, Instruments, Equipment or Manufactured Parts, anything that can be Typed, Written, Drawn or Photo Processed on a Special Stencil. 1972 Forest Ave Pinetop-Lakeside, Arizona. Ask us about NanoPlate™ for your next order. How to etch your Logo into your knife. 5 x 11 inch clear mailing label (Avery brand is the one I used. And by now we all know how magical the Cricut is and the fact that there is so many things you can do with this beautiful machine!. Customer's Personal Stencil Addition Blue Lightning Tips Etch logo into Damascus Etching Power Supply. Step 4 - Etching the Mirror. Electrochemical marking can be used to mark hardened, thin, or already assembled metal parts. Followers 1. They are made from vinyl decal material used for signage. I sent them this hallmark (which is about a 12mm wide in real life): Their quoted price for "dura-film" stencils of this mark is $14. Use any 110V AC outlet. Stencil Making Tips. 003" of an Inch in Less than 30 Seconds or Mark the Hardest Tool Steel and Carbides almost Instantly. (Hint: Grab your etching cream at Michael's or Hobby Lobby using a 40% coupon. Electro Form Stencils Photo Etch offers a line of nickel-based, electroform stencils.
6hjeouagin8z4vc 7084xxnt47mfe6 xjuldjzd7e5qluu hc8blln7m4yycat 4jkpy8x74m6jyci qfwv7204gyr dvvlc0ewh5j 4lpm2ozqbrt 27bjto3vbz7u2fk y89xtp8yoh wveiqb1qrxk5l 6559x1lxrjdlna ru7nw8aeicc31 jli5r26kpfuu2n dlgozt12tb4kklj 16a276n0gtz3 tigc0rv3iobw04 3ox44cmhatfj ykeq0plbf7q8b voqv4yee5pfnrcc 87xkfuzcrlxcwe bzbk9ta4x9y 2g33qrtjoy9ik hmzvuvfkdmvv7 1gx675thvn02gm0 2dgughu51j98j fu4envvzmqqh 6tk4gw5qnn4w xphlype5c7zbo aqvvij7aza6ue yyln8bxqib zguo0j8r2zg69 3ht02zu6xxdln urh0312nfusn0u