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Shanghai Weixing Optical Company

RETURN 1.56 Photochromic Lens 1. PHYSICAL AND OPTICAL PROPERTIES Return lenses are produced of high quality, low density, and middle index (1.56) photochromic monomers. The photochromic dyes are fully incorporated into the material rather than applied to the surface. The lenses keep the ability to respond to UV light longer and are more color consistency. Refractive Index N=1.56 ABBE Number V=42 D...

http://www.wxoptics.com/p10.htm

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