They have a lot of coats so they appear very thick. How to test a body finish to determine poly vs nitro. Thats because the type of finish that is applied to a guitars body and neck. You should wear a properly fitted vapour respirator during the application and drying of nitrocellulose lacquer.
Montana black is a nitro combinationbased paint in a highpressure can that provides excellent control and handling. Nitrocellulose lacquer is made by taking cotton and treating it with sulfuric and nitric acid, generating an acidic pulp, which can be strained to produce a watery resin. Some companies are putting a layer of nitro over the poly finishes to try and fool the end consumer or maybe to. May 16, 2014 lacquer is mixed in a different solvent, and is relatively clear. Most modern drums are finished in polys because poly doesnt age, is not really susceptible to yellowing and spider cracks. The term lacquer originates from the sanskrit word laksha representing the number 100,000, which was used for both the lac insect because of their enormous number and the scarlet resinous secretion. The resulting resin is then combined with a number of fast drying solvents to produce the finished lacquer. Methane, nitro, also known as nitromethane, is an industrial chemical which may also be found in various products available to canadians.
Lacquers cracks a degenerative finding noted in pathological. One longstanding claim in particular is that the finish affects the tone, with nitro finishes being at the top of the tone heap and poly finishes at the bottom because of their supposed blanketing effect. Jun 01, 2007 lacquer cracks are clinically noted in 4. Varnish polyurathane finish is blended into an oil base, and cures hard. Clear nitro cellulose lacquer can be used over the tinted lacquers, to give a protective top coat that can be polished to a high gloss. The lowodor, nondrip paint formula has a short drying time allowing for rapid reapplication and overlapping of colors. He said something that i had not heard, namely, that after spraying nitro on a guitar, you need to wait 2 3 months for it to cure and settle before moving on with it. Scraping and sanding, using kerosene as a lubricant for the sandpaper. Angioid streaks are a retinal condition characterized by breaks and cracks in bruchs membrane, the lower layer of the retina that helps feed and nourish the overlying photoreceptor layer. Manufactured by among others dupont, the paint was also used on automobiles sharing the same color codes as many guitars including fender and gibson brands, although it fell out of favor for a number of reasons. In addition to online sales our trade counter is located in stockport, cheshire and is open to the public and trade customers. The cracks appear as thick, brown or grayish lines that radiate from the area around the optic nerve. It can be spot repaired easily and when buffed, shows a beautifull shine.
Nitrocellulose lacquer, often referred to as nitro or cellulose lacquer, is a classic finish used on cars, instruments and furniture up to 1970s. With the high solids content of this vs the cheaper paints, you get better, more complete coverage with your sprays. Angioid streaks are bilateral, narrow, irregular lines deep to the retina configured in a radiating fashion emanating from the optic disc, which result from breaks in a weakened bruchs membrane. Emerson, md, phd retina center of minnesota coauthors. Lacquer crack started in the right eye and became evident 1 year later in the left eye. Nitro, however, made a nicer gloss by all accounts so what to use where was an ongoing process of trial. There is a website for guitar finishers called that sells it in spray bomb form us only. It is classified as an explosive when nitrogen content exceeds 12. Clear nitrocellulose lacquer 400g aerosol spray can. It would look like this clear nitro on bare wood, color coat nitro, same clear nitro on top of the color. Lacquer yielding trees in thailand, vietnam, burma and taiwan, called thitsi, are slightly different.
The last step in the process is to seal the newlystained guitar. A nitrocellulose lacquer also wears away over time, causing dulling in areas where you make regular contact with your guitar. It is a clear liquid to semisolid when dissolved in alcohol, acetone or an etheralcohol mixture. Better, but still no advantage over either a wetting to raise gran and sanding back. Nitromethane is principally used as a fuel additive for drag car racing and model engines, a laboratory and industrial solvent, a stabilizer in degreasers, a solvent in making dental.
I was also using a commercial brand of nitro which was definitely a problem when used on wood. Looking for sources of nitrocellulose lacquer paint. The end result is similar but softer than the chinese or japanese lacquer. Serial photography after repeated intravitreal injections of. Bruchs membrane can thicken, calcify and begin to crack. Lacquer is nearly as deep and clear looking, but it requires spray equipment and safety equipment.
Look for lacquer cracks in high myopes for early warning. Nitrocellulose lacquer nc lacquer is still available in canada but short of musical instruments its really not used much any more but for this application its tough to beat. Nitro is a much thinner finish than poly and it doesnt clog the wood pores. A can goes further, meaning this stuff costs less per project.
Im with frank on this one my initial attempts at nitro spraying many years ago resulted in longitudinal cracks throughout the lacquer on swamp ash mainly and this was definitely a result of too much lacquer, too soon with too little thinner. Angioid streaks knapp streaks statpearls ncbi bookshelf. Progressive symmetric vertical macular wide angioid streaklike. Apart from the above, small cracks can appear in a nitro finish after several years too. Nitrocellulose guitar paint and lacquer guitar paint and. Also nitro has a much thinner finish on guitars and is easily rubbed off hence, vintage relics. Lacquer cracks are seen in almost 5% of highly myopic eyes, and the reported incidence of cnvm associated with these lesions is as high as 10%. Diluente nitro antinebbia, nitro thinner colorificio san. Mohawk finishing products m1020541 mohawk finishers.
Lacquer is mixed in a different solvent, and is relatively clear. Kerosene works better than water to keep the sandpaper from loading up, and it wont cause the wood grain to swell or raise if it gets into any little cracks or voids in an old finish. The lownitrogen form of nitrocellulose is soluble in. Apart from the above, small cracks can appear in a nitro finish after. These breaks are usually linear and hence named angioid or like blood. Like any other lacquer, it can be used to finish wood products and keep painted surfaces shining, though there is much more to it than that. In 1889, doyne first described angioid streaks in a patient with retinal hemorrhages secondary to. Unfollow nitrocellulose lacquer to stop getting updates on your ebay feed. Looking for sources of nitrocellulose lacquer paint is.
Angioid streaks are bilateral, narrow, irregular lines deep to the retina configured in a radiating fashion. Nitrocellulose also yellows with time, especially when exposed to excessive sunlight. Inhalation exposure to nitrocellulose lacquer and related. Reranchstewmac nitro discussion in luthiers corner started by gilmourisgod, sep 15, 2014. Vinyl sealer replaces the stearate with vinyl additive. If your kit was done in nitro or even acrylics it would be a much simpler fix. It is admired for its high sheen and glossy quality. Angioid streaks represent a rare ophthalmic condition that has very specific ophthalmoscopic features but is caused by different etiologies. Solvent based finishes like shellac and lacquer will melt together as you apply layer upon layer, forming a continuous film. When spraying nitro over acrylic, you have to do it in light mist coats and let each coat dry to the touch until you got a good 2 coats of nitro over the acrylic. Burmese lacquer sets slower, and is painted by craftsmens hands without using brushes. The last thing you want are streaks to dry over the lacquer, marring your otherwise nicely finished guitar.
One of the most disappointing of those is the tendency to check or crack with a sudden drop in temperature. Myopic cracks, angioid streaks, and traumatic tears in bruchs membrane. Lacquer cracks vs angioid streak vs choroidal rupture all three diseased statesof bruchs membrane angioid streaks emanate radially from disc, are straighter,and are reddish in color. Okay, i put poly in quotes because its come to be a somewhat if not outright derogatory catchall term for any finish that isnt nitrocellulose lacquer. Once the learning curve is behind us, once the equipment is owned, its pretty easy to apply, very forgiving of mistakes the guitar turned out fine once the problem was finally remedied.
May 16, 2009 im with frank on this one my initial attempts at nitro spraying many years ago resulted in longitudinal cracks throughout the lacquer on swamp ash mainly and this was definitely a result of too much lacquer, too soon with too little thinner. Mohawk finishing products m1020541 mohawk finishers choice. Nitrocellulose lacquer is also very toxic and can be flammable if not handled properly. When the paint becomes thin, just add a few new coats. I usually dont recommend trying to fix such checks, because they are often an inevitable part of the nitrocellulose lacquer aging process. Improving differential diagnosis of angioid streaks retinal physician. Myopic cracks, angioid streaks, and traumatic tears in bruch. Nitrocellulose lacquer was also used as an aircraft dope, painted. He wants to know if the rest of the car can be sanded and recleared. Nitrocellulose is an explosive compound produced by the reaction of cellulose and nitric acid, or other strong nitrating agent. Nov 19, 2010 sanding sealer is actually less transparent than the lacquer, and weakens the adhesion of the lacquer. I would search for other names of nitrocellulose lacquer, there is a link below. Used since the 19th century, nitrocellulose is a multiuse chemical employed.
A lacquer or paint finish on an acoustic instrument is designed to protect the wood from dirty fingermarks, grease, tomato sauce spills etc. This is an extremely common, somewhat expected condition on older instruments with lacquer finishes. The bestapplied sealant is the kind with invisible lines. Choroidal ruptures, similar distribution, color, and fluoresceinangiographic appearance to. Mar 06, 2018 nitrocellulose lacquer is a popular finish for some instruments and furniture, but did you know it never cures. Checking will vary according to the extremes the instrument has been through. Montana black nitrocombination matte lacquer spray paint. In fact acrylic paints were developed because they were more colourfast and didnt crack and check as easily as the older nitrocellulose paints. Forming a very thin layer it allows the wood to resonate freely with little restraint. Note lacquer should only be used in a well ventilated area. Myopic cracks, angioid streaks, and traumatic tears in. Clinically, they appear as fine, irregular yellow lines, single or multiple, linear or stellate, often branching and crisscrossing at the posterior pole, usually within an area of staphyloma.
Ophthalmologists should be aware that there are numerous systemic diseases associated with angioid streaks, the most common being pseudoxanthoma elasticum. How to test a body finish to determine poly vs nitro fender. Deft clear lacquer is nitro so if you find a can of deft in your hardware store read the label and see who actually made it. Looking for sources of nitrocellulose lacquer paint is it. As an instruments wood expands and contracts with moisture content stress is placed on the finish. Nitrocellulose is produced by nitric acid reacting with cellulose. Jeff, in your case being you already have nitro lacquer on the the guitar you cannot put acrylic over it. Making your own nitrocellulose lacquer can be done using cotton and treating it with sulfuric and nitric acid.
Nitrocellulose is a lacquer and is harder to work with. I was thinking if i can use a clear nitro lacquer right at the wood to act it as a primersealer mostly to even out the surface and prevent the wood from taking too much color coat. Look for lacquer cracks in high myopes for early warning of. This type of lacquer, which dries quickly is used in auto finishes and on wood. Lacquer cracks are often mistaken for angioid streaks. Angioid streaks differential diagnoses medscape emedicine. Nitrocellulose lacquer does have some nasty habits. Angioid streaks usually emanate from the disc, tend to be straighter, and are reddish in color. All our sample neck colour photos show three coats of the labelled nitro tint laquer on top of a clear sanding sealer base. Many guitarists, particularly those who love vintage instruments, believe everything affects the sound of those great old guitars we love so much. Nitrocellulose lacquer i told him how oxnard wasnt producing guitars yet with nitro, and that we had heard about problems and challenges theyre experiencing. Now you can get rustoleum or deft lacquer that is a nitro lacquer at you local big box store that is just as good, without the price tag or wait. Anyone servicing the wood finishing market should be able to get nc lacquer, the challenge maybe the quantities.
Sanding sealer is actually less transparent than the lacquer, and weakens the adhesion of the lacquer. Improving differential diagnosis of angioid streaks diagnostic considerations and a case study. Conversely, lacquer cracks are found in more than 80. Retinal physician easily misdiagnosed retinal entities. A discussion started in 2002 but continuing through 2019. Improving differential diagnosis of angioid streaks. Nitro lacquer discussion in the small company luthiers started by ducryder, jul 22, 2009. Nitrocellulose can appear as a pulpy, cottonlike solid when dry. Jan, 2016 many guitarists, particularly those who love vintage instruments, believe everything affects the sound of those great old guitars we love so much. Although uncommon, angioid streaks often have a systemic cause and.
Nov 01, 2011 improving differential diagnosis of angioid streaks diagnostic considerations and a case study. A thin acrylic lacquer finish will be basically indistinguishable from nitro, except that it wont yellow and crack over time. Lacquer cracks must be differentiated from 2 similar diseases of bruch membrane, namely angioid streaks and choroidal ruptures. The term lacquer is used for a number of hard and potentially shiny finishes applied to materials such as wood or metal. Nitrocellulose lacquer is a material which has many uses both inside and outside the home. How to refinish a guitar with nitrocellulose lacquer. The shine is still there but more subtle and less reflective. Apr 15, 1987 myopic cracks, angioid streaks, and traumatic tears in bruchs membrane. Nitrocellulose lacquer is a popular finish for some instruments and furniture, but did you know it never cures. Reranch will be a much better product than that stuff. I have a guy i know that has a 20 year old black lacquer paint job, just needs a little freshening. Doesnt matter if its polyester, acrylic urethane, polyurethane enamel, uv curable acrylite, epoxy its poly and its bad.
Some companies are putting a layer of nitro over the poly finishes to try and fool the end consumer or maybe to make the guitar turn yellow with age. The epa also has iris, that should have information on the different solvents plus the doesresponse and exposure. Tonetech ltd provides luthier supplies, luthier tools, guitar paint and nitrocellulose lacquers across the uk and europe. Nitrocellulose lacquer has been used on guitars since the fifties and sixties because of its excellent characteristics. Spray a coat of clear lacquer satin or gloss to seal the wood and sand lightly to denib if you want to add any colour you should spray tinted lacquer at this stage to achieve your desired shade then you spray clear satin lacquer to build up finish thickness then sand back and apply a final coat as in my any special tips for satin and.