Check out the latest addition to the ‘Best Practises’ page: I’ve added a section on glues. Here are some interesting tidbits:
- Hide glue is made from the same process which produces food gelatine (Jello), but gelatin is not the same as hide glue.
- Similar animal glues have been in use for about 6,000 years.
- White and yellow “carpenter’s” glue were only invented in the early 20th century.
- Additives of urea, salt, glycerine and vinegar to hide glue modify the glue, some with detrimental effects.
- There is an additive that prevents liquid hide glue from gelling.
I also discuss briefly the preparation of hot hide glue, the interpretation of various glue ‘bloom strengths’, and where these are typically employed.
An interesting aside: ‘Bloom’ refers to both the expansion of the dry hide glue when it expands and also the “Bloom Strength” which is actually named for the inventor the gel strength measurement device: the gelometer, seen on the right. Invented and patented by Oscar T. Bloom.