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Posts: 1108
Joined: Sep. 29 2009
From: Back in Boston
French Polish and Dentistry
I was curious if anyone has looked into this idea. When dentists do composite fillings or acrylic temporary crowns they use a light that hardens the material in no time. From what I have read it takes a while for french polish to gain some hardness and I was wondering if using a version of the dentist "magic light" would be effecitive in speeding up the process.
RE: French Polish and Dentistry (in reply to keith)
Using UV lights to help cure finishes is nothing new, I've seen violin guys doing it for years to help set up the oil varnishes. What is relatively new is finishes designed to cure in the same way you find at the dentist. Taylor has been using that for some time but lately I have been hearing about others using it, without the telltale sign of a Uv cured finish. In other words it looks good. And it is very fast, spray it on, hit it with the light and buff out. I am very interested in UV cured pore filler which I have been hearing about lately. It isn't cheap to get into it but the idea of filling a guitar perfectly in a matter of a half hour of work is really appealing. And the filler is clear, which I think looks much better than paste filler.
RE: French Polish and Dentistry (in reply to keith)
The UV set nail gels are basically the same stuff the dentist use, just thinner. I have been using UV set gels on my nails for years. Last for weeks and stands up to all the abuse I give them.
The downside is it cost about a 100 bucks to get set up with the light and supplies, but the gels last about two years or more.
RE: French Polish and Dentistry (in reply to keith)
for finishes i think we need to establish the differences between dryign and curing.
Some finishes dry, literally the moisture evaporates. Other finishes cure or harden.
Cement/concrete for example, does not dry it cures.
The way that things cure or dry is important because anyone who has ever sprayed nitro knows, if its too humid or you dont let it gas out between coats, you get hazing and clouding.
same with FP, gotta let it gas out long enough so the finish can cure.
Those synthetic poly finishes that are UV cured have a catalyst in them that polymerizes when subjected to intense UV light, thus the finish hardens and is cured.
Adding this to FP would instantly kill it because half the fun of FP is its thinness and ease of repairing. adding a catalyst that polymerizes with UV would pretty much make it impossible to reactivate with solvents.
RE: French Polish and Dentistry (in reply to keith)
I've used UV light for French Polish 25 years ago. The idea was to darken it to make it look antique. I quit doing that when I learned colored French Polish. UV took long time and was a lot of hassle(I used fluorecent type bulbs).
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