Earlier in 2014 I was working with Liquid hide glue, and had a container on the shelf, upon checking it there was a shelf life expiry date 20/2010 so I went and bought another.
I did some tests on both at the time, pre May 2014 and I did not see any discernable differences in the expired glue and the fresh batch I had just bought, so both went on the shelf.
There they stayed until today, I was readings Stefangs blog on his home made LHG.
He conducted some strength destruction tests on his batch of glue, and noted LHG had a short shelf life.
So this prompted me to get my lot out again.
Upon checking I found the batch I bought earlier this year had now also expired in May 2014.
I was going to do some more tests to see if there was any difference in the expired batch and current batch but this was not to be the case.
As I was not keen to spend another $14 AUD just to do the tests I decided to use both expired batches, so here we with Part 1 the Glue up and technical information of the products.
Firstly here is a shot of both samples.
and the small print on the back showing the expiry dates.
First up a viscosity or settling test, as this will indicate a problem if there is a vast difference in viscosity.
Glue up Tests
I applied a sample of glue
Initally joined together and then separated to check glue spread.
I again applied a sample of glue
Then did a glue spread check again.
A result of reading the glue should be applied with a heavy spread.
Checking the glue spread again.
Apply clamps for 30 minutes
After 30 minutes had expired I removed the clamps and took another shot of the
The skin of the glue must have set in the 30 m as there was an ant walking around on the glue, maybe he was a small LJ.
I will now leave them for 24 hours and continue with Test No2 the stress test in 24 hours
Some Preliminary observations/results
It appears the 20/2010 sample B is less viscous (more runny) then the May 2014 Sample A.
This is most evident in the settling sample and in the meniscus of the test samples.
-- Regards Robert