Process of producing multicolor optical filters

Claim 1

A process of producing a multicolor optical filter which comprises: exposing a multilayer color photographic material comprising: (1) a silver halide emulsion layer containing a colored coupler (1b) colored cyan, magenta or yellow and forming a dye having one of the other two principal colors by coupling reaction with the oxidation product of an aromatic primary amine color developing agent, and (2) a silver halide emulsion layer (2) containing a silver halide emulsion (2a) having a sufficiently high sensitivity that upon exposure that does not produce an image in emulsion layer (1) upon development, an image is produced in emulsion layer (2) and containing a colored coupler (2b) having the same color as that of the dye formed by the coupling reaction of the colored coupler (1b) in emulsion layer (1) and forming a cyan, magenta or yellow dye other than the color of the colored coupler (1b) or the color of the dye formed by coupling reaction of the colored coupler (1b); said exposure being such that a portion of the material is unexposed and no image-wise development occurs in the silver halide emulsion layer (1) or (2), a portion is exposed in an amount sufficient to increase the coupling color density of the silver halide emulsion layer (2) and no image-wise development occurs in silver halide emulsion layer (1), and the remaining portion is exposed in an amount sufficient to produce image-wise development of the silver halide emulsion layer (1); and processing the color photographic material in color developer containing an aromatic primary amine color developing agent.