I stand corrected. I just received a response from Franklin technical: "The Titebond Liquid Hide Glue will soften with high humidity, often above 60%. Most pianos don't see that extreme, even in Tampa, where humidity is high." So I guess it is most reasonable to believe the part about liquid hide being affected by high humidity. I have monitored my home extensively and for a good part of the year the RH is between 60% and 75% - so whereas I have to believe what they say about the glue characteristics, they are incorrect about common indoor RH. So now for the practical question: So HOW MUCH does liquid hide glue soften with high humidity? Enough for it to be a concern using it for the soundboard/rim joint? Is hot hide glue similarly affected by humidity? If so, then I would say there is little concern with liquid hide glue softening with high humidity. Maybe I'm glad I used Titebond Extend on my last soundboard installation..... Terry Farrell ----- Original Message ----- > For your clarification and to try and help Stéphane sort this out: > > Here is the exact quote from the good folks at Tite-Bond themselves. > Sounds to me like the folks at Tite Bond will not recommend liquid hide > glue for this application. > > "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." > > This answer was give in response to the following question, also an > exact quote > > "Some European technicians told me it would possibly fail in an > environment > which has more than 50 % relative humidity. > What do you think ?" ...... > > "The piano might undergo a relative humidity level of 60 % here. > Will the > liquid hide glue joint stand this ? On the open portion of the > perimeter, > the only stress the joint will undergo is the dimensional change of the > board under relative humidity change." > -------------- next part -------------- An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/20080123/ae4638f2/attachment.html
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