Method for producing a multicolor optical filter

Details Method for producing a multicolor optical filter Method for producing a multicolor optical filter

1979-06-28

1981-06-02

Brown, J. Travis

Radiation imagery chemistry: process, composition, or product th

Radiation modifying product or process of making

Screen other than for cathode-ray tube

430 24, 430 27, 430 28, 430365, 430366, 430376, 430948, 430952, 350317, G03C 504, G03C 500, G03C 700

Patent

active

042712467

ABSTRACT:
A method for producing a multicolor optical filter, which comprises exposing a photographic material comprising a support and at least one black-and-white silver halide emulsion layer to light through a first pattern; developing the exposed emulsion layer with a first coupler-containing color developer to form a pattern of a first dye; then exposing an unexposed portion of said emulsion layer to light through a second pattern; developing the exposed area with a second coupler-containing color developer to form a pattern of a second dye; optionally repeating exposure and development to form patterns containing dyes of third and subsequent colors, thereby to form color patterns of at least two colors; and subjecting the product to a silver removal treatment after the final color development step.

REFERENCES:
patent: 2628902 (1953-02-01), Raibourn
patent: 2683769 (1954-07-01), Banning
patent: 2704252 (1955-03-01), Gresham
patent: 2820090 (1958-01-01), Mountain
patent: 3592649 (1971-07-01), Parsonage et al.
patent: 4081277 (1978-03-01), Brault et al.

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