----- Original Message ----- From: "Delwin D Fandrich" <pianobuilders@olynet.com> To: <oleg-i@wanadoo.fr>; "Pianotech" <pianotech@ptg.org> Sent: March 08, 2003 7:59 AM Subject: Re: Epoxy Man Strikes Again > > > > Epoxyes seems to be cook sometime, to attain their final hardness > > temperatures as high as boiling water . I suspect we don't want to > > cook our soundboards as that ! > > So, it's OK to heat the soundboard to 120º F (approx. 50º C) when using > animal hide glue but it's a problem to raise the temperature of the wood by > some fraction of a degree (by either scale) when using epoxy? Let's think > this through. > > Epoxy adhesives are thermosetting. They cure by chemical reaction and they > do generate heat as they cure. What I meant to say is, "Epoxy adhesives are exothermic. They cure by chemical reaction and in the process they generate." A case of my brain going one way and my fingers another. Del
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