At 20:30 +0100 21/1/08, Stéphane Collin wrote: >What makes me doubt is that Iasked a Titebond technician how the >glue joint would behave in my climate, which is 25 % relative >humidity in the worse days of the winter and 65 % in the wettest >days of the summer. Here is what the guy answered me : > >" The Titebond Liquid Hide Glue is sensitive to humidity, even when dried. >At the least, it can soften in the humidity you describe. If the substrates >part during that time, the bond will fail. If the substrates remain together >during that time and the humidity lowers, the bond will remain. I hope this >answers the question." I have no experience with Titebond LHG but I presume the same could be said of any hide glue by its very nature, and unless it is subjected to really extreme humidity, or worse, really heavy fluctuations from extreme aridity to extreme humidity, no ill will befall. I had an old 1880 Schiedmayer (J&P), assembled with good hide glue of course, that I left outside in the English weather for over three years. It refused to disintegrate or go much out of tune and the brass-wound bass strings sounded fine all the way to the bonfire. The humidity here as I write is 94% and will often reach 99%. We're lucky to get 75% even in the summer. Our pianos do not fall apart! Much though I love hide glue for most work, I would not hesitate to use other hard-setting glues for sticking down the soundboard. There is quite a choice: 1. A casein glue such as Cascamite 2. Aerolite 306, urea-formaldehye resin glue <http://cgi.ebay.co.uk/Aerolite-306-Synthetic-Resin-Wood-Glue_W0QQitemZ350013342206> 3. West Systems epoxy All these allow plenty of time before setting/curing and all of them are, I think, completely resistant to moisture. JD
This PTG archive page provided courtesy of Moy Piano Service, LLC