<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <meta http-equiv="Content-Type" content="text/html;charset=ISO-8859-1"> <title></title> </head> <body text="#000000" bgcolor="#ffffff"> Don, My limited experience so far is that tuning stability after a soundboard is epoxied is better than before, crown or no crown. I suspect that it has more to do with rigidity of the top surface of the board than moisture content control. Tom Cole Don wrote: <blockquote type="cite" cite="mid3.0.6.32.20041020112747.0191c4c0@accesscomm.ca"> <pre wrap="">Hi Dean, Just because epoxy is "water proof" does not mean that it is "vapor proof". You may be able to raise the partial pressure, or slow transfer of water vapor, but eliminating it by coating wood is probably a futile endeavor. I suspect that the "better tuning stability" may be simply an almost total lack of crown. At 09:30 AM 20/10/2004 -0500, you wrote: </pre> <blockquote type="cite"> <pre wrap="">The theory is the epoxy penetrates the wood and fills the cells. The wood cells act as a matrix for the epoxy, this is what Del spoke of in the articles. And it does make some sense. So it is not a thin layer of epoxy riding on top of the wood that is providing the stiffness and strength, but the whole matrix of the wood cells reinforced and filled by the epoxy. I am planning on trying this out soon and my intent is to epoxy both sides of the board. I would think that the cells penetrated by the epoxy would be resistant to any subsequent moisture effects. Dean </pre> </blockquote> <pre wrap=""> Regards, Don Rose, B.Mus., A.M.U.S., A.MUS., R.P.T. Non calor sed umor est qui nobis incommodat <a class="moz-txt-link-freetext" href="mailto:pianotuna@accesscomm.ca">mailto:pianotuna@accesscomm.ca</a> <a class="moz-txt-link-freetext" href="http://us.geocities.com/drpt1948/">http://us.geocities.com/drpt1948/</a> 3004 Grant Rd. REGINA, SK S4S 5G7 306-352-3620 or 1-888-29t-uner _______________________________________________ pianotech list info: <a class="moz-txt-link-freetext" href="https://www.moypiano.com/resources/#archives">https://www.moypiano.com/resources/#archives</a> </pre> </blockquote> </body> </html>