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This Document Has Been Superseded
A newer publication replaces it: BSI BS 6625-1
Specification for cellulose acetate sheet for spectacle frames
Specification for Cellulose Acetate Sheet for Spectacle Frame
This specification outlines the requirements for cellulose acetate sheets used in the manufacturing of spectacle frames. The material must possess high transparency, excellent dimensional stability, and good mechanical strength to ensure durability and comfort.
The sheets should be free from defects such as discoloration, bubbles, and cracks. They must conform to specified thickness tolerances and maintain uniform color consistency throughout the batch.
Additionally, the acetate sheets should be resistant to chemicals and environmental factors, ensuring long-lasting performance. The product must comply with all relevant safety and quality standards applicable to optical materials.
Cellulose acetate sheet, made by block slicing or by extrusion, for the manufacture of spectacle frames.
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