Photochromic emulsion

Details Photochromic emulsion Photochromic emulsion

1990-07-02

1991-12-17

Stoll, Robert L.

Compositions

Light transmission modifying compositions

Inorganic crystalline solid

430267, 430266, 430567, 430568, 430569, 359609, 359580, 359241, G02B 520

Patent

active

050733036

ABSTRACT:
A photochromic material adapted for coating light transmissive materials. The photochromic material contains photosensitive silver halide crystals having dimensions in the range of approximately 50 Angstroms to 800 Angstroms. The silver halide crystals are surface doped with copper ions and another sensitizer selected from mild reducing agents or sulfur-bearing ions. The crystals are dispersed in a protective polymer that does not irreversibly bind halogen.

REFERENCES:
patent: 4049567 (1977-09-01), Chu et al.
patent: 4049846 (1977-09-01), Hovey
patent: 4110244 (1978-08-01), Hovey
patent: 4556605 (1985-12-01), Mogami et al.
patent: 4596673 (1986-06-01), Beale
patent: 4942119 (1990-07-01), Ozin et al.

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