Abstract

Casein glue, made from soured skim milk, then dried, ground, and blended, has been in use in Germany for 50 years and in the United States for 30 years, but it was not until the World War period that it came into general commercial use. It was then that easy-to-use formulas of standard type were developed for the production of waterproof plywood in airplane construction. It now has general use in the woodworking industry. Casein glue in the past has relied upon harsh alkalis as a waterproofing agent. The casein glue of the future for veneering will be relatively only slightly alkaline, but will be high in water resistance through the addition to the dissolved glue of a chemical solution. The smaller user will have a glue that will carry overnight without loss of strength, will be quick setting and strong, and that will have sufficient water resistance for ordinary needs.

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