本文件已被宣布“稳定”，不再接受货币定期审查。用户负责验证参考文件和持续适用性或技术要求。可能存在新技术。本规范涵盖了一种光学质量、透明的聚碳酸酯塑料，已在其上涂覆了硬质保护表面涂层，以平板或由平板制成的成型零件的形式提供。这些产品通常用于在不利环境条件下需要光学质量和可维护性的零件，如车窗，但使用不限于此类应用。

This document has been declared "Stabilized" and will no longer be subjected to periodic reviews for currency. Users are responsible for verifying references and continued suitability or technical requirements. New technology may exist.This specification covers an optical-quality, transparent, polycarbonate plastic, to which a hard protective surface coating has been applied, supplied in the form of flat sheet or formed parts made from flat sheet.These products have been used typically for parts, such as vehicle windows, requiring optical quality and serviceability under adverse environmental conditions, but usage is not limited to such applications.