R 408.13352 Materials.

Rule 3352. Materials used in the manufacturing of eye protectors shall combine mechanical strength and lightness of weight to a high degree, shall be non-irritating to the skin when subjected to perspiration, and shall withstand frequent sanitizing. Metals, where used, shall be corrosion resistant. Plastic materials, when used, shall be noncombustible or slow-burning. Cellulose nitrate, or materials having flammability characteristics approximating those of cellulose nitrate, shall not be used.