Sinew glue - question

PAZUZU · Post by **PAZUZU** » Mon Nov 19, 2012 8:29 pm

Hi
one of these days I will finish work on electric glue pot. My question is: How many degrees is the best temperature for cooking of sinew glue?

Bede · Post by **Bede** » Tue Nov 20, 2012 12:16 am

Do you mean the manufacture of sinew based animal glue?

Or do you mean the safe temperature to soak sinew in glue?

I guess you mean the first one. Adam's book on Turkish bows is useful for both. I haven't experimented with this myself and also would be interested in people's opinions.

jiao · Post by **jiao** » Tue Nov 20, 2012 3:30 am

the modern science and technology is quite greet , i make bladder glue at 50 centigrade for 48 hours, i take it as failing glue, but when i add some powder, the fabulous super glue i got, without any kind of bladder or hide glue make in what temperature and times, i think it is a book only page one of lot's page about connect collagen ,the sinew strings can "glue" himself not need any glue, but i failing horn glue himself

PAZUZU · Post by **PAZUZU** » Tue Nov 20, 2012 10:39 pm

Yes,
my question is related to manufacture of sinew based animal glue. I find very diverse information ...for time of cooking - from 5-6 to 48 hours. cooking temperature - from 70 to more than 90 ??? degrees. for me it is very confusing. I want to follow tested recipes. i will use ox sinews.

Uli · Post by **Uli** » Wed Nov 21, 2012 2:42 pm

I have made "pure" sinew glue from scrap sinew

by simmering just below bubbling for 3 hours, then putting all to an electric vegetable blender and simmering for 3 more hours, filtering through a linen cloth and letting dehydrate after use at 50?C repeatedly (to get thicker glue).

the result is a grey-yellow glue and was strong enough for grip V-splices and some layer of sinew (the rest I made with your sturgeon air bladder glue

I can not tell whether this is good glue or not but at least it was glue.

Adam Karpowicz · Post by **Adam Karpowicz** » Thu Nov 22, 2012 12:27 am

Collagen in the sinew requires higher temperature and longer time than the bladders to break down and dissolve and still produce decent yield. There are no hard rules - less time and lower temps yield faster gelling glue (larger molecules), but less of it. I normally heat at 80-90deg for 6 hours and find the glue good enough. It is not gelling as fast as the commercial hide glue or pure gelatine (which are made with the use of acids to break down collagen), but still useable for all purposes. You may want to experiment and decide what is best for you.

Adam

PAZUZU · Post by **PAZUZU** » Thu Nov 22, 2012 9:44 pm

well .. I will follow your experience and my sensations. Adam, you use a blender for crushing the sinew fibers?

Adam Karpowicz · Post by **Adam Karpowicz** » Fri Nov 23, 2012 12:09 am

No, I cut the fresh tendons into shortl pieces or use the leftover dry sinew fibers as they are. I have not used dry whole tendons, but if I had to, I'd soak them in water for a couple of days and cut as the fresh ones.

Adam

Uli · Post by **Uli** » Fri Nov 23, 2012 8:46 am

without blender makes a nice clear glue - probably better

PAZUZU · Post by **PAZUZU** » Fri Nov 23, 2012 8:36 pm

o.k.
thanks for the advices.
when ready to inform you about my success or failure.

PAZUZU · Post by **PAZUZU** » Tue Dec 04, 2012 10:53 pm

PAZUZU · Post by **PAZUZU** » Tue Dec 04, 2012 10:54 pm

Well....
the hot water container is completed. Now I am tempted to make a stirrer driven by an electric motor. Do you think that the glue can be cooked in a court of inox steel? I always cook the glue in glass or porcelain dishes, but I have no alternative but inox steel pipe - https://plus.google.com/u/0/photos/1167 ... fGih5W3wgE

sissara · Post by **sissara** » Tue Dec 11, 2012 9:54 am

I did pure sinew glue a couple years ago.
Just put sinew in a jar, add water, close the lid, put in a 70 C oven for a week or so, filter, pre-dry, cut to pieces, oven dry.

PAZUZU · Post by **PAZUZU** » Sun Mar 02, 2014 9:57 pm

finally my glue pot is ready. I hope soon to find time to prepare the sinew glue.

Kviljo · Post by **Kviljo** » Mon Mar 03, 2014 10:18 am

NICE!!