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CR-39 material |
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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. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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