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Harpsichords and Related Topics

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From:
Stephen Bacon <[log in to unmask]>
Reply To:
Harpsichords and Related Topics <[log in to unmask]>
Date:
Sat, 5 Mar 2016 10:05:23 -0800
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In response to David Pickett. I'm glad you brought up fish glue. I have had similar failures with the brand mentioned( in liquid form) as I have with the treated or liquid hide glue. I've correlated the failures to high humidity thru testing. However my isinglass (dry sturgeon bladder) performs better than even 315 (graham strength)hot hide glue in high humidity situations. As I have almost run out, does any one have a source for isinglass in the dry form? Because I live in a dry area my worries are different than Michigan or the east coast. However as a general precaution as well as help in gluing large surfaces sizing has always been a must for me. A well sized surface( double sizing or one to soak in, one to fill the pores)lets one glue very efficiently over large surfaces with just a very hot thinned sizing glue with out fear of jelling. 
I understand that making any statement on hide glue is at risk because it's use has many variables of formulation, environment, and technique. I can only speak from my own experience, be they either successful or failures. 
As an aside I have seen failure of PVA on instruments due apparently to excessive UV exposure. 


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