Or better yet, we should demand handcarved, taptuned spruce pickguards finished in nitro. If you glue your eyelids shut, id go easy on the acetone and maybe seek pro help. 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. Lacquer cracks are considered to represent mechanical fissures in the retinal pigment epitheliumbruchs membranechoriocapillaris complex secondary to eyeball elongation in highly myopic eyes. Looking for sources of nitrocellulose lacquer paint is. Dont forget that acetone nail polish remover is your best remedy for getting your fingers unstuck with crazyglue. Sigler is a retina specialist at the charles retina institute and an upcoming associate of ophthalmic consultants of long island, division of retina and vitreous. One of the most disappointing of those is the tendency to check or crack with a sudden drop in temperature.
Choose a lacquer repair kit which contains the substances that you can use to fill the cracks in the lacquer. Surface looks as if the lacquer boiled and remained grainy. This is an extremely common, somewhat expected condition on older instruments with lacquer finishes. Pigmentation seen through it reflects underlying pigment from the retinal. You cannot do any thing to prevent it but eye specialist may do further investigation like fluorescein angiography or ocular coherence tomography oct and may. Prevention and management of myopia and myopic pathology iovs. You should wear a properly fitted vapour respirator during the application and drying of nitrocellulose lacquer. Lacquer crack means that there is break in bruchs membrane it is a significant finding as you are at risk of getting cnvm choroidal neovascular membranes, which means new blood vessels will start forming.
There is no irregularity or distortion of the neurosensory retina or retinal vessels overlying the lacquer cracks. Im talking minimum plasticizers, no yellowing inhibitors, ultra thin coat capable. Lacquer crack appearance a term of art referring to a pattern in the optic fundus characterised by branching clefts in the lamina vitrea and ruptures of bruchs membrane with choroidal atrophy, which is seen in progressive degenerative myopia. Lacquer crack lesions in pathologic myopia sciencedirect. Nitrocellulose lacquer thats closest to the old stuff. Looking for sources of nitrocellulose lacquer paint. Resultsthe lacquer cracks progressed in 37 eyes 56. Look for lacquer cracks in high myopes for early warning. Lacquer cracks have only been observed in the posterior pole of highly myopic eyes. No, modern nitro finishes arent exactly as they used to be, but well take them over glasslike polyester any day as a result and also due to their ease of use compared with oldstyle solventbased lacquers more robust, easiertoapply, quicker to cure, lowvoc finishes notably polyurethane and polyester were developed and are now the. Pdf peripheral lacquer cracks as an early finding in. Methodsthe authors studied 66 eyes 53 patients with lacquer cracks, using general ocular examinations and fluorescein angiography once every 3 to 12 months. Particularly helpful would be cases involving exposure in woodworking.
The content on this site is presented in a summary fashion, and is intended to be used for educational and entertainment purposes only. Lacquer cracks are present in high myopia and can lead to choroidal neovascularisation and macular haemorrhage, which in turn can cause central visual loss but it is not very common. Lacquer cracks are found in the posterior fundus of 4. What modern nitro lacquer have you guys found to be close to the vintage stuff. In six patients lacquer cracks were present in only one eye. Mohawk finishing products m1020541 mohawk finishers. Lacquer cracks are breaks in the retinal pigment epithelial bruchs.
Lacquer cracks conditionkeywords pathologic myopia, lacquer cracks imaging device fundus camera description color fundus photograph of a 48yearold woman with lacquer cracks in the setting of pathologic myopia. Lacquer cracks definition of lacquer cracks by medical. 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. Myopia is one of the most prevalent eye diseases and a worldwide public. Lacquer cracks are considered to be healed mechanical fissures in the retinal pigment epthelium rpebruchs membranechoriocapillaris. Lacquer finishing trouble shooting guide wood finish supply. Most of the lacquer that rustoleum sells is acrylic lacquer as well, except for the watco spray and brush nitrocellulose lacquer, which is only available in clear. Lacquer cracks following laser treatment of choroidal. Clear nitrocellulose lacquer 400g aerosol spray can. They represent healed and mechanical breaks of the retinal pigment epithelium, bruchs membrane, and. The eyes of men have a 2fold incidence of lacquer cracks as compared with those of women. Nitrocellulose lacquer was initially marketed as a fastdrying alternative to wood treatments such as shellac and varnishes. 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. I usually dont recommend trying to fix such checks, because they are often an inevitable part of the nitrocellulose lacquer aging process.
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. 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. Choroidal thickness and biometric markers for the screening of. It is not intended to be and should not be interpreted as medical advice or a diagnosis of any health or fitness problem, condition or disease. Lacquer cracks and primary atrophic changes appear excavated on sdoct. Lacquer cracks in pathologic myopia retina image bank. 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. Fixing crack in the lacquer the steel guitar forum. This report describes comparable lesions in the retinopathy, globe enlarged rge chick. Its acrylic lacquer, while the majority of their product line is acrylic enamel.
Jones, md, phd, retina center, minneapolis, mn, uploaded on oct, 2012. Nitrocellulose lacquer commonly called nitro or simply just lacquer finishes are great, dont get me wrong. Apply this paste into the cracks and gently smooth it down. Nine eyes of five patients had grade 2 in volvement with lacquer cracks fig. However, lacquer cracks are a classical symptom of myopic degeneration and while your condition may remain stable for many years, the odds are more in favor of problems as you age. Note lacquer should only be used in a well ventilated area. How to refinish a guitar with nitrocellulose lacquer. Conversely, lacquer cracks are found in more than 80. Lacquer cracks and perforating scleral vessels in pathologic. Spontaneous lacquer crack lesions in the retinopathy. Scraping and sanding, using kerosene as a lubricant for the sandpaper. A discussion started in 2002 but continuing through 2019. Nitrocellulose lacquer is a popular finish for some instruments and furniture, but did you know it never cures.
Mohawk finishing products m1020541 mohawk finishers choice clear satin lacquer, oz. It was also combined with pigment to produce one of the first sprayon paints. It can be resurfaced and buffed over real nicely too. The progression of lacquer cracks in pathologic myopia. They represent healed and mechanical breaks of the retinal pigment. The last thing you want are streaks to dry over the lacquer, marring your otherwise nicely finished guitar. Full text lacquer cracks observed in peripheral fundus of eyes with. Lacquer crack, first described by salzmann in 1902 16, represents breaks in the bruchs membrane. Patients with history of hypertension or diabetes, confounding ocular disease, additional eye operations, including vitreoretinal or cataract surgery or refractive surgeries, and other myopic complications including lacquer cracks, posterior staphyloma, choroidal atrophy, choroidal neovascularization, subretinal hemorrhage, macular traction, macular hole, retinal detachment, and retinoschisis. Inhalation exposure to nitrocellulose lacquer and related. Nitrocellulose lacquer does have some nasty habits. The thin, watery superglue will fill cracks in lacquer pretty well.
Nitrocellulose products are generally a mixture of mononitrocellulose, dinitrocellulose, and trinitrocellulose, where each glucose unit in the cellulose chain has one, two, or three nitro groups, respectively. A thin acrylic lacquer finish will be basically indistinguishable from nitro, except that it wont yellow and crack over time. It would look like this clear nitro on bare wood, color coat nitro, same clear nitro on top of the color. A project from the american society of retina specialists. This will fill the gaps but it will always be slightly visible. Lacquer cracks are breaks in the retinal pigment epithelialbruchs. Anyone servicing the wood finishing market should be able to get nc lacquer, the challenge maybe the quantities. Lacquer crack appearance definition of lacquer crack. Today it is still used for staining woods as its cheap, dries quickly and blends well with the natural grain and coloring of different woods.
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. The beginning stages of posterior staphylomas are very difficult to discern on physical exam for runofthemill retinal specialists or general ophthalmologists. Now that you have a clean and scratch free finish you can concentrate on filling the cracks. I was also using a commercial brand of nitro which was definitely a problem when used on wood.
All our sample neck colour photos show three coats of the labelled nitro tint laquer on top of a clear sanding sealer base. Lacquer crack lesion lcl, a complication of myopia in human patients, is characterized by loss of retinal pigment epithelium and breaks in bruchs membrane. Patchy atrophy and lacquer cracks predispose to the. The bestapplied sealant is the kind with invisible lines. Each eye with lacquer cracks had tem poral crescent formation at the optic disk. 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%. Something you would use in the restoration of a 1930s martin. When the lacquer cracks are large, choroidal vessels may traverse the lesion posteriorly. Has there been any research on the effects of inhalation exposure to nitrocellulose lacquer and related solvents in humans.
Retinal physician easily misdiagnosed retinal entities. Longterm natural outcomes of simple hemorrhage associated. A total of 35 eyes of 30 patients with lacquer cracks were included. As an instruments wood expands and contracts with moisture content stress is placed on the finish. Lacquer is nearly as deep and clear looking, but it requires spray equipment and safety equipment. Diphosphopyridine nucleotide dpnh diaphorase nitroblue tetrazolium bt.
Ten eyes showed circumpapillary extension of the crescent. There is a website for guitar finishers called that sells it in spray bomb form us only. Choroidal ruptures, similar distribution, color, and fluoresceinangiographic appearance to. Nitrocellulose lacquer i told him how oxnard wasnt producing guitars yet with nitro, and that we had heard about problems and challenges theyre experiencing. The last step in the process is to seal the newlystained guitar. If you dig their majestic mojo and the way they wear over time, awesome. Too heavy of a film buildup of lacquer at one time. 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. Bruchs membrane shows discontinuities, called lacquer cracks, which may lead to.
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