<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=Content-Type content="text/html; = charset=windows-1252"> <META content="MSHTML 6.00.2800.1226" name=GENERATOR> <STYLE></STYLE> </HEAD> <BODY> <DIV><FONT face=Arial></FONT> </DIV> <DIV><FONT face=Arial>----- Original Message ----- </FONT> <DIV><FONT face=Arial>From: "Phillip Ford" <</FONT><A href="mailto:fordpiano@earthlink.net"><FONT face=Arial color=#000000>fordpiano@earthlink.net</FONT></A><FONT face=Arial>></FONT></DIV> <DIV><FONT face=Arial>To: <</FONT><A = href="mailto:pianotech@ptg.org"><FONT face=Arial color=#000000>pianotech@ptg.org</FONT></A><FONT face=Arial>></FONT></DIV> <DIV><FONT face=Arial>Sent: August 27, 2003 11:36 AM</FONT></DIV> <DIV><FONT face=Arial>Subject: Re: Overs laminated = soundboard</FONT></DIV></DIV> <DIV><BR><FONT face=Arial></FONT></DIV> <DIV><FONT face=Arial>But in ordinary plywood they try for very thin = layers and lots of them, presumably to prevent much movement of the panel even with = changing humidity.  And I thought part of the reason for preventing = movement (aside from dimensional stability) was to prevent breaking down = the glue joints.  I wonder if there is any long term danger to the glue = joints with 3 layers 2.5 mm each.<BR></FONT></DIV> <DIV><FONT face="Comic Sans MS" color=#000080>In part.  Thin = layers are used to prevent fiber damage from compression and tension as the panel = is exposed to varying climate conditions. When kept thin enough wood = doesn't develop the kind of compression damage that it does in thicker sections. = </FONT></DIV> <DIV><FONT face="Comic Sans MS" color=#000080></FONT> </DIV> <DIV><FONT face="Comic Sans MS" color=#000080>No, I don't know what = the limits are.</FONT></DIV> <DIV><FONT face="Comic Sans MS" color=#000080></FONT> </DIV> <DIV><FONT face=Arial>> <BR>> Perhaps if laminated panels in = pianos became common enough suppliers would start making them in quantity.  One = could buy a laminated panel just as one can currently buy a solid = panel.<BR></FONT></DIV> <DIV><FONT face="Comic Sans MS" color=#000080>We can = hope....</FONT></DIV> <DIV><FONT face=Arial></FONT> </DIV> <DIV><FONT face="Comic Sans MS" = color=#000080>Del</FONT></DIV></BODY></HTML>