Chemically speaking, the final few percent of the drying time can take longer than the first 95%. Shellac doesn’t exactly grow on trees, but lac, an insect secretion, is havested off tree bark. (Drying time: 2 hours for water-based and 6 hours for oil-based) Don’t let the terminology trip you up. The best way to explore shellac’s possibilities is to make a few sample boards like those shown above. Sand again only to smooth the surface or remove finish imperfections. Happy to help someone who's so interested in learning. Here are four problems shellac can readily solve. Drew,I can certainly understand your frustration but the beauty of shellac is that if you're not happy with your application you can just take a rag saturated with denatured alcohol and remove it.Why don't you just do that and start over.Obviously you're not happy with what you have accomplished so far and working on that case in a bad mood isn't going to help things.This time don't pad so thick and so often.One coat every twenty or thirty minutes is doable.Are you sure you made a two lb. If your shellac is fresh the drying time should be measured in minutes, literally as soon as the alcohol has evaporated shellac is considered touch-dry and it should no longer be tacky*. Thank you Bob, You provided a superb answer to my question. 6 = June), the third number is the day of the month, and the last number is the manufacturing run for that day. The clear and amber are three-pound cuts; SealCoat is a two-pound cut. Tell me again what was the cut of the shellac you used? Zinsser BIN is a stain block, adhesion primer and barrier coat all in one. Adhesion and Durability. The dry time for your Sealcoat is about 20 to 30 minutes, unless you don’t mind your sandpaper corning and clogging. Super-fast dry time – Shellac dries to the touch in MINUTES and, in most cases, can be sanded or recoated in a little over half an hour. The secret to a smooth finish is … Recoat as required until you’re happy with the finished look. To start, try using a one or one-and-a-half pound cut. Old shellac solution or solution made with old flakes can take forever to harden properly. Drew I'm a little confused. To start, buy or borrow a few kitchen implements, as shown in Photo A. I'm just about finished with my first case refinishing job in shellac, but it does seem to be taking a bit longer than I expected for the final coat to dry and harden up. You want enough shellac in your brush so that the stroke flows smoothly. I ordered shellac flakes and Behkol from Homestead Finishing for this sewing machine cabinet. Super-fast dry time – Shellac dries to the touch in MINUTES and, in most cases, can be sanded or recoated in a little over half an hour. No paint came off even when we used heavy pressure. Do not expose to storage temperatures > 95º F for extended periods of time. However, this wax also reduces the transparency of the finish film, makes the shellac less water resistant, and can affect the adhesion of some topcoats. And varnish is far easier to apply to a high standard, in large part because of the relatively slow drying time. National Association of Watch and Clock Collectors Inc (A 501c3 non-profit corporation). Shellac’s quick dry time reduces runs. This helps shellac flow seamlessly and eases cleanup. In fact, it can dry quickly enough to snag your brush or pad. There are many references on web with solvent evaporation rates and compatibility, such as: If you applied all five coats in one day I believe I would give it two weeks to rub out. I just purchased the flakes directly from. (You may also want try a super thin, one-half pound cut as a wash coat. For a thinner mix, simply add a little more alcohol. When starting out, you may want to stick with darker shellacs on darker woods (use garnet to spice up kiln-dried walnut) and lighter shellacs on light woods (blonde flakes add a hint of color to maple), but as you’ll soon discover, shellac can serve as an effective dye toner. Heat and alcohol can dissolve and deteriorate shellac, making it a poor choice for any surface where you might rest a coffee mug, shot glass, or perfume bottle. Self-priming paint is a paint and a primer in one. Now, fashion a golf ball-sized lump from cotton or gauze. As you’ll soon see, shellac’s pros far outweigh the cons. I have already considered removing the shellac and starting over, but I'm not convinced I want to give up just yet. The manicure is cured with a special LED lamp made exclusively for shellac, so there's virtually no drying time, according to Arnold. It shounds like you did everything right. Of course, shellac isn’t without a few flaws. Working with shellac: don’t stop Although a surface may not be ready for sanding and recoat for about two hours, it dries to the touch in minutes. If you’re looking for a faster, easier alternative, canned shellac is available in three flavors: clear (formerly known as white), amber, and dewaxed clear known as SealCoat. It has a mildly antiseptic odor that dissipates very quickly as the product dries. same way. Drew I think the main advantage of padding shellac as opposed to brushing shellac is the is the quickness of the drying time when padding as opposed to brushing.Normally when you are brushing on shellac you should let it dry a minimum of four hours or longer dependent on enviromental conditions,i.e.,humidity,air temperature,etc..If you pad properly you should be able to pad a fresh coat of shellac about every fifteen minutes.During the course of a day thats a helluva lotta coats and the beauty of padding is you don't have any brush marks to contend with which in turn makes sanding a lot easier with less of a chance of sanding through your finish.I can't stress enough that padding is multiple applications of a light coat of shellac each time you pad.You have to resist the temptation to lay it on thick to accelerate the application time.thick coats require longer drying times and kind of go against the benefits of padding.Personally I like to use a pad about the size of a tangerine with the outter wrap made from an old pillow case(no lint balls)and for the pad stuffing I use cotton balls.Draw it up tightly so you don't have any creases on the pad surface and rubber band off the open end.Fill up a squeeze bottle about a quarter way with your shellac and you're ready to go.When you pad come down on your case and glide your pad along the surface and lift it off with a forward motion.Try not to overlap your previous application too much with your next stroke because this will cause streaking because the shellac dries so fast during padding.Call me Mr. Overkill but its nothing for me to put down twenty or thirty coats when I pad shellac.It gives me a nice built up shellac finish and I've never had the unpleasant experience of sanding through.Thats me though. All the work was done indoors in an air-conditioned environment. Subscribe to the newsletter and get 10% off your next purchase in addition to the latest products, guides and project ideas. This helps when refinishing antiques that might still have residues from polishes, oils, or other mystery contaminates. Fresh new flake shellac, Kleen Strip brand denatured alcohol, never left the jars open, padded on the shellac in many thin coats, etc. Remove any sanding residue. We used Zinsser BIN shellac based primer. If you add a small ring of shellac around the mouth of the sac as an extra measure, it seems it would be best to give additional time. I'm new at clocks but I have been working in wood for quite a few years. Do you coat the dried shellac or the sand paper with the oil? A light coat of shellac can quickly fix an old piece that smells musty, or a new project that still reeks of finish months after it was applied. Therefore, it is only suitable for spot-priming when used outdoors. Colored shellac can be used much like a toner or light dye stain to provide some color while enhancing the grain. The thinner cut builds more slowly, but reduces the likelihood of brush marks. JavaScript is disabled. Shellac can be made to dry slower. Use a kitchen scale to keep your cuts consistent. Maybe your flakes are bad? Log In. This is when ultraviolet (UV) wavelengths hit molecules called photoinitiators in the gel formula and activate them. A small batch usually dissolves in a few hours; larger batches can take more than a day. Aerosol cans are perfect for sealing or finishing smaller projects. Regards. The amount of shellac and alcohol you'll mix yields a certain amount of shellac for finishing. Weigh the flakes, pour them into the jar, and then add the alcohol. Yes, I did in fact make a 1.5 lb cut, coincidentally. Can slow down evaporation rate with any finishing material, by using a slow evaporation solvent that is compatible with system. The best alcohols to use are butanol, iso-butanol, and (if you can get it) undenatured ethanol. Remove the top film with a plastic-backed, lint-free pad saturated with 99% isopropyl alcohol. 514 Poplar Street If Shellac Retarder is used, longer drying times between coats and to final cure are required. Using flakes for a first-class finish or effective sealor. For padding, you’ll want a two-pound cut. An overloaded brush will drip with any sudden movement; an under-loaded brush leaves bristle marks. Dampen the center of this cloth with denatured alcohol, as shown in Photo D. As with brushing, maneuver the pad with brisk, deliberate strokes, slightly overlapping each previous pad stroke. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. As the name suggests, “pound cut” refers to the number of pounds of flakes that gets mixed into a gallon of denatured alcohol. After the first coat, sand only if you need to smooth the surface or to correct mistakes. It can take a while for that last little bit of solvent to migrate outwards. In addition to being a renewable resource, shellac is one of the least toxic wood finishes. Truly a great primer for tough to adhere surfaces. Tinting the primer toward the color of the topcoat helps hide in one coat. Dry shellac is usually sold in two-pound, three-pound, or four-pound containers. Veritas, there is an airesol (I think I misspelled that word) on the market. After that time check for proper drying by brushing on a piece of scrap wood. In less time than it takes to read this story, you’ll see how this bug-borne resin adds color and highlights grain quite unlike its modern competition. Recharge the pad when the shellac stops flowing (Photo E). The one thing I have noticed about using dewaxed shellac is that its sanding qualities diminish greatly. With age comes decreased water resistance. DRY TIME Dries to the touch in 20 minutes, can be recoated in 45 minutes. I see Tom mentions olive oil which I assume the sand paper is used in conjunction with. So, my advice would be to use shellac for jobs where it is a useful part of a finishing regimen (e.g. "Curing is one of the most important parts of the process," she explains. Thanks Craig for the info.I have a small compressor so not sure what it can do.I think i would like to start the aplication of shellac by hand. Odor blocker. Tap the pad to disperse the shellac to the core. I appologize if this is something that has been described in detail previousely. Once the wood is sealed, the shellac will be easy to apply, but don’t forget that the alcohol dissolves into previous coats, so quick, smooth brush strokes are important. Shake to blend. Wide range temperature for application: between 0f and 90f (-18c and 32c). Clock Case Construction, Repair & Restoration. I know that shellac with too much water in it can take months to dry. Cut a 10-inch square of lint free cotton or linen cloth. The secret to a smooth finish is to keep the brush or pad in constant motion. Unlike some varnishes or lacquers, shellac doesn’t yellow or become cloudy with age. Thanks again Robert. Like latex, shellac primers dry quickly, usually within 60 minutes. Drew I think the main advantage of padding shellac as opposed to brushing shellac is the is the quickness of the drying time when padding as opposed to brushing.Normally when you are brushing on shellac you should let it dry a minimum of four hours or longer dependent on enviromental conditions,i.e.,humidity,air temperature,etc.. Strain out undissolved chunks and other impurities before they find their way into your finish. Paint stripper that has a LOT number of S66227 would have been part a... Where it is still used as a problem-solving sealer sanding easier, gives the to... 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Way into your finish drying between coats thin, one-half pound cut are,. 26 of Woodcraft Magazine oil-based alkyd finish everything sticks to shellac thank you Lamar, I thought 'd!, the final few percent of the process, '' or mixed with a brush pad. The strength or, more accurately, the term varnish usually refers to a year each coat after... Some varnishes or lacquers, shellac isn ’ t back-brush your work a plastic-backed lint-free! Supporting role as a sealer of flakes and premixed, contains a amount! Correct itself, provided you don ’ t yellow or become cloudy with.! Mixed it and used it immediately wavelengths hit molecules called photoinitiators in the gel formula and activate them '' mixed. Or four-pound containers hours for water-based and 6 hours for water-based and 6 hours for and. Weeks and gelish up to 2 ounces of flakes and and alcohol you 'll mix yields a certain amount wax. Tacky but, a 1 1/2 lb first-class finish or effective sealor start a few people seem interested in CND. That shellac adds rich, shellac drying time tones without obscuring the grain film with a,! Know how much help I can be, but there will still be trapped... Javascript in your brush. ) dry for two hours, lightly scuff-sand the first coat 320-grit.
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