Excerpt from Assessment of Photooxidation of Flexible Plastics Roofing by a Colorimetric MethodAll coatings were commercial products, but only Ac, csp, and SR were specially formulated for roofing application. The pvca coating was clear, and the others were pigmented white.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully, any imperfections that remain are intentionally left to preserve the state of such historical works.