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Making hide & sinew glue from scraps

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BowEd:
I usually throw both sinew and hide scraps together to make my glue.I see no special reason of any kind that make one material better than another.They both gell approximately at the same time.Maybe you have thoughts or even experiences of your own on the subject?
I have not fooled with much sturgeon palate glue though as I hear it does gell slower which they say is a key to it's strength.I do have fish bladder glue though.I control my gelling of hide and sinew glue by keeping it warm enough in my enviornment to slow the gelling down.
As with most all glues proper surface preperation for specific different types of glue on wood or horn is the key to success as most glues will do their job if we do ours properly.

DC:
I've only ever made hide glue but I'm building up a small store of sinew scraps. I just wasn't sure if it was worth making a separate pot of sinew glue. I'll throw them all in the same pot. I would probably get them mixed up later anyway :D

BowEd:
That might be the way to go for you.I have and do make quite a few things out of rawhide too myself so the supply of glue making material can accumulate rather quickly.There's always a bit of waste while sinewing a bow too.Especially if a person does it the dry stripping way.Not as much waste the wet stripping way.
My gauge for that came to about a pound of rawhide and sinew material gave me 2.5 ounces of hide glue.That's enough to do a bow.

Aaron H:
Great work Ed. Nice color on those, especially the batch to the right.  Was there any difference in the way you cooked the two batches?

Also I imagine you soak the rawhide prior to cooking?

BowEd:
Thanks Aaron....The darker batch got heated a little too hot in the beginning of the process thus it came out darker in color.Still usable and plenty strong yet for most simple composite bows.The lighter the color the better.
I only did 1 pour off each batch.More cooking and more pourings are possible for more glue but the quality may suffer then too.
I did pre soak the rawhide overnight before cooking it down to glue.The thicker the rawhide the more soaking time.
Pulverizing the rawhide into smaller pieces would help to extract more glue during cooking too.
Using hide scrapings from dry scrape dehairing is perfect stuff to use.It breaks down quicker with less heat.

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