Photochromic glasses suitable for simultaneous heat treatment an

Details Photochromic glasses suitable for simultaneous heat treatment an Photochromic glasses suitable for simultaneous heat treatment an

1978-04-12

1978-12-19

Vertiz, O. R.

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

106 53, 106DIG6, C03C 326, C03C 308, C03C 2100

Patent

active

041304373

ABSTRACT:
The instant invention is related to the manufacture of photochromic glasses having base compositions within a very narrow interval of the alkali metal boroaluminosilicate system wherein silver chloride and/or silver bromide crystals impart photochromic properties. The glasses are notable for their rapid fading characteristics and relatively low temperature dependence of darkening. The compositions are especially suitable for a production process which contemplates simultaneously shaping articles from glass sheet and developing photochromic properties therein.

REFERENCES:
patent: 3197296 (1965-07-01), Eppler et al.
patent: 3208860 (1965-09-01), Armistead
patent: 3306833 (1967-02-01), O'Leary
patent: 3449103 (1969-06-01), Stookey
patent: 3540793 (1970-11-01), Arayio
patent: 4018965 (1977-04-01), Kerks et al.

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