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Title: Preproduction sample of the first photochromic glass from Ch [Go to resource]
Description: Preproduction sample of the first photochromic glass from Chance Pilkington, type FPX2, made in 1972, 90% to 20% transmittance for 2mm thick sample License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Subjects: ophthalmic lens blank Temporal: 1986-1987 Source: Science Museum Creator: Chance-Pilkington Identifier: 1987-13 Go to resource More Like this...
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