<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML xmlns:o = "urn:schemas-microsoft-com:office:office"><HEAD> <META http-equiv=Content-Type content="text/html; charset=UTF-8"> <META content="MSHTML 6.00.6000.16587" name=GENERATOR></HEAD> <BODY id=role_body style="FONT-SIZE: 10pt; COLOR: #000000; FONT-FAMILY: Arial" bottomMargin=7 leftMargin=7 topMargin=7 rightMargin=7><FONT id=role_document face=Arial color=#000000 size=2><FONT style="BACKGROUND-COLOR: transparent" face=Arial color=#1f497d size=2> <P class=MsoNormal><SPAN lang=EN-US style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'"><o:p></o:p></SPAN></P> <DIV><SPAN lang=EN-US style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'"><o:p><FONT size=2>  <STRONG><EM>Hi Stephane</EM></STRONG></FONT></o:p></SPAN></DIV> <DIV><SPAN lang=EN-US style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'"><o:p><STRONG><EM><FONT size=2>  Well the board is a bit warm as it comes out of the box & I also warm the bottle in my glue pot so it is warm & more viscous.  I apply glue to both board & rim.  Usually 2 of us & three if it's a large piano.</FONT> <FONT size=2>However the working time is such that I could do both surfaces by myself</FONT></EM></STRONG></o:p></SPAN></DIV> <DIV><SPAN lang=EN-US style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'"><o:p><FONT size=2><STRONG><EM>  </EM></STRONG></FONT></o:p></SPAN><SPAN lang=EN-US style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'">Dale, in case I go for cold hide glue (reversible and very hard, if I got that right), what procedure do you recommend ?  Must the wood be warm too ?  Should I warm the glue too ?  Is the room temperature critical too ?  It seems that I can get the Titebond liquid hide glue here.  On their site they say no need to warm anything, but the articles of Nick Gravagne recommend to do so.<o:p></o:p></SPAN></DIV> <BLOCKQUOTE style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: blue 2px solid"> <P class=MsoNormal><SPAN lang=EN-US style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'"><o:p> </o:p></SPAN><SPAN lang=EN-US style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'">I’m a bit concerned with the board warming : I put it in a small room at 35°Celsius and reach 20 % relative humidity.  After one day and one night, the board is completely flat, and the “dead” corner (beyond the dumb bar) begins to show reverse crown. </FONT></P></BLOCKQUOTE> <DIV><FONT size=2><STRONG><EM>Stephane ....my friend...This is roughly 3.6 ish E.M.C   This is extremely dry & cell damage will occur quickly in a humid climate.  Ask me how I know?</EM></STRONG></FONT></DIV> <DIV><FONT size=2>  <STRONG>What is your e.m.c. at the time the ribs are pressed.  Are the ribs crowned.  All this is relevant to your questions. It sounds like the board was compression crowned</STRONG></FONT></DIV> <DIV><FONT size=2>  <STRONG><EM>It's Probably too dry if its' reverse crowning.  You need a  simple temp. & humidity gauge inside  your box to track where the board is at with it's E.M.C. content ( equilibrium moisture  Content).  </EM></STRONG></FONT></DIV> <DIV><FONT size=2><EM><STRONG>  In conjunction with a simple chart that correlates the temp/humidity to the emc gives you a close idea where the moisture content is at any time.</STRONG></EM> <FONT size=4><EM><U>Really important!!!!!!!</U></EM></FONT></FONT></DIV> <BLOCKQUOTE style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: blue 2px solid"> <P class=MsoNormal><FONT style="BACKGROUND-COLOR: transparent" face=Arial color=#1f497d><FONT size=2>Does this sound normal ?  Is there no risk to overdo the board warming ? </FONT></FONT></P></BLOCKQUOTE> <DIV><STRONG><FONT size=2>  Yes Of course</FONT></STRONG></DIV> <DIV><FONT size=2>  </FONT></DIV> <DIV><FONT style="BACKGROUND-COLOR: transparent" face=Arial color=#1f497d><FONT size=2> I initially intended to leave it dry for 3 days, and I can reach 17% relative humidity if I want, but I’m a bit afraid to do more wrong than good. </FONT></FONT></DIV> <DIV><FONT style="BACKGROUND-COLOR: transparent" face=Arial color=#1f497d><FONT size=2> <STRONG><EM>17 percent even at reasonable temperatures is way too dry. ie. 70 Degrees & 25% humidity for spruce  is  roughly 5.4 percent & plenty dry for a rib crowned board.</EM></STRONG></FONT></FONT></DIV> <DIV><FONT style="BACKGROUND-COLOR: transparent" face=Arial color=#1f497d><STRONG><EM><FONT size=2>  35 degrees celcius at 17 percent humidity is 3.6 percent.</FONT></EM></STRONG></FONT></DIV> <DIV><FONT style="BACKGROUND-COLOR: transparent" face=Arial color=#1f497d><STRONG><EM><FONT size=2>  Ahh this the intense learning curve we all engage in when we do this work.</FONT></EM></STRONG></FONT></DIV> <DIV><FONT style="BACKGROUND-COLOR: transparent" face=Arial color=#1f497d><STRONG><EM><FONT size=2>  The smart thing you do is to ask questions.  Next time ask sooner. We could be of more use.</FONT></EM></STRONG></SPAN></DIV> <BLOCKQUOTE style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: blue 2px solid"> <P class=MsoNormal><SPAN lang=EN-US style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'"><o:p><FONT size=2> </FONT></o:p></SPAN><SPAN lang=EN-US style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'"><FONT size=2>Thanks again for taking time for new board newbies.</FONT></FONT></P></BLOCKQUOTE> <DIV><FONT size=2>  <STRONG>Hope it all works out</STRONG></FONT></DIV> <DIV><STRONG><FONT size=2> Dale</FONT></STRONG></DIV> <P class=MsoNormal><FONT style="BACKGROUND-COLOR: transparent" face=Arial color=#1f497d><FONT size=2><o:p></o:p></FONT></SPAN> </P> <BLOCKQUOTE style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: blue 2px solid"> <P class=MsoNormal><SPAN lang=EN-US style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'"><o:p><FONT size=2> </FONT></o:p></SPAN><SPAN lang=EN-US style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'"><FONT size=2>Best regards.<o:p></o:p></FONT></SPAN></P> <P class=MsoNormal><SPAN lang=EN-US style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'"><o:p><FONT size=2> </FONT></o:p></SPAN><SPAN lang=EN-US style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'"><FONT size=2>Stéphane Collin.<o:p></o:p></FONT></SPAN></P> <P class=MsoNormal><SPAN lang=EN-US style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'"><o:p><FONT size=2> </FONT></o:p></SPAN></P></FONT></BLOCKQUOTE> <DIV></DIV> <DIV> </DIV></FONT><BR><BR><BR><DIV><FONT style="color: black; font: normal 10pt ARIAL, SAN-SERIF;"><HR style="MARGIN-TOP: 10px">Start the year off right. <A title="http://body.aol.com/fitness/winter-exercise?NCID=aolcmp00300000002489" href="http://body.aol.com/fitness/winter-exercise?NCID=aolcmp00300000002489" target="_blank">Easy ways to stay in shape</A> in the new year. </FONT></DIV></BODY></HTML>