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Mat Roop Senior Member
Joined: 24 Mar 2007 Posts: 911 Location: Wyoming Ontario
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Posted: Wed Mar 22, 2017 10:42 pm Post subject: old glue that is grey? |
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Every once in awhile I get a violin for repair and when opened up the old glue residue is an opaque beige-grey in color. It is water soluble but certainly does not look like the hide glue that is standard these days.
Was it just a less pure form of hide glue? or something else?
Thoughts?
Cheers, Mat |
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Rick M Member
Joined: 18 Sep 2016 Posts: 65 Location: Okotoks, AB, Canada
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Posted: Wed Mar 22, 2017 11:46 pm Post subject: |
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What came to mind when you describe beige-grey glue was Casein.
I recall helping my Dad mix up batches of the nasty stuff as a kid, but can say I recall what it was like dried out. Again, distant memory but clean up with vinegar maybe. |
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Chet Bishop Super Member
Joined: 23 Mar 2007 Posts: 678 Location: Forest Grove, Oregon
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Posted: Thu Mar 23, 2017 9:13 am Post subject: |
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There have been numerous water-soluble glues used:
Hide-glue
Rabbit-skin glue
bone glue
fish glue
isingglass (glue made from sturgeon bladders)
casein (milk solids by-product)
The only one I really am familiar with is the hot hide-glue...and even it varies all over the board, in terms of looks: How fresh was it, how clean was it, what grade was it to begin with. Some are very clear, some have quite a bit of color. I tend to try to use the clear grades.
I dread seeing polyurethane glues, epoxy and even Elmer's glue in violins. It always turns out to be a bit of a nightmare. If I can tell ahead of time that epoxy or polyurethane is involved, I have simply refused the job...and probably will do so again. the problem is that you can't always see it before you open the fiddle, and then you are sorta committed.
It sounds like you at least have something workable, since it is water soluble. _________________ Chet Bishop
https://bluefiddles.com
https://fivestringfiddles.com |
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