Question

Which property of the material is considered to make speectacles​

Answer 1

Answer:

Explanation:

Both PVC and titanium are usually hypoallergenic. Most plastic glasses are made of zyl (also called zylonite, acetate and cellulose acetate) or propionate. Other materials used in plastic frames include polyamide, nylon, polycarbonate, carbon and Optyl (a brand of epoxy resin).

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Answer 2

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