This document stipulates the basic requirements, composition, technical requirements, test methods, inspection rules, signs, labels, packaging, transportation and storage and quality commitments of cast industrial organic glass sheets (hereinafter referred to as sheets). This document applies to colorless and colored transparent, translucent or opaque cast industrial organic glass with a thickness of 1.5 mm to 30 mm, which is made of methyl methacrylate as the main raw material and bulk polymerized in a specific mold. Plate.