CR-39 material

(redirected from allyl diglycol carbonate)

CR-39 material 

Allyl diglycol carbonate or Columbia Resin. CR-39 is a light transparent plastic material (refractive index 1.498, V = 59) used in the manufacture of spectacle lenses and much harder than polymethyl methacrylate. It is not quite as hard as glass. Syn. hard resin. See constringence; plastic lens.
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Contract award: Polyn Allyl Diglycol Carbonate (PADC) also known as CR-39 sheets Supply of Lot 1 and Cutting and Encoding of Lot 2.