TESTING GLUE BY WATER ABSORPTION
The soaking of glue in cold water before using is employed in some factories as a basis for comparative test of working quality. The amount of water absorbed may vary as much as 10 ounces in half a pound. Other things being equal, the glue that absorbs the most water is of course the cheapest to use. As a comparative test, melt up say 10 pounds of glue and see how much work it will do compared with the glue you are now using.