We Still Don’t Boil Houses: Examination of the Boil-Dry-Boil Test in Plywood Standards

In developing test procedures, there is sometimes a conflict between tests that simulate long term service conditions, and nonsimulative tests that ale quick and inexpensive to perform. With a product which is unique, the only choice is to develop simulative test procedures, though they may be time consuming, complicated, and expensive. However, when adequate knowledge of the product and manufacturing process has been gained, it is usually possible to devise simple, nonsimulative tests procedures for quality control. The boil-dry-boil test used in plywood standards is an unsatisfactory compromise between a simulative and nonsimulative procedure. The test is not long enough to function as simulative glueline performance test, but it is excessively time consuming to function as a quality control procedure to detect problems such as dry-out and undercure, or to exclude urea formaldehyde adhesives from use in exterior plywood.

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