Making Animal Glue Water Resistant

In this paper the author gives a formula for making animal glue water resistant. Graphs are given which show the relation between the temperature and the working life of a batch of glue when prepared by the recommended formula, and also for a glue containing paraformaldehyde without oxalic acid. Rapid decrease in the working life of both glues at high temperatures makes it necessary to control the heating of the glue carefully. Characteristics of a water-resistant animal glue are given, together with the effect of varying the content of oxalic acid and paraformaldehyde.