Optically clear copper halide photochromic glass articles

Compositions: coating or plastic – Coating or plastic compositions – Metal-depositing composition or substrate-sensitizing...

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106 54, 106DIG6, C03C 326, C03C 308

Patent

active

042227810

ABSTRACT:
Silver-free, cadmium-free, copper halide-based alkali aluminoborosilicate glasses exhibiting good optical clarity and good photochromic darkening and fading are provided by controlling the alkali, Al.sub.2 O.sub.3 and B.sub.2 O.sub.3 concentrations in the base glass and/or adding MoO.sub.3 or WO.sub.3 thereto.

REFERENCES:
patent: 3325299 (1967-06-01), Araiyo
patent: 3954485 (1976-05-01), Seward et al.
patent: 4076544 (1978-02-01), Kerks et al.
patent: 4166745 (1979-09-01), Araiyo et al.

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