Report on Interlaboratory Ozone Test Program of Astm Committee D-11, Subcommittee XV on Life Tests for Rubber Products, 1957

TL;DRAbstract

Early in 1957 a plan was outlined by the Ozone Test Section of Subcommittee XV of ASTM Committee D-11 on Rubber and Rubber-Like Materials for an Interlaboratory Test Program. This program's main objective was to determine the degree of variation that existed among laboratories with nominally identical ozone test chambers when testing specimens prepared and cured from a single rubber mix. There were also several secondary objectives. Since the advent of the first industrial ozone test chamber (Crabtree-Kemp), two later chambers have appeared. The first -was the Bush chamber and more recently the Mast chamber. Both of these feature the forced air circulation that has been demonstrated as necessary for valid and meaningful tests. Both of these chambers were included in this test program, and a comparison between the two is possible. This is one of the secondary objectives. Another objective was to determine how well various laboratories could maintain a given ozone concentration for a per

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