Production of photochromic films, e.g. for windows or sunglasses, comprises activating a silver image formed by illuminating a surface coated with a silver halide emulsion

摘要

Production of photochromic films comprises coating a surface with a silver halide emulsion, illuminating the emulsion in areas where photochromic darkening is required, removing residual emulsion from nonilluminated areas, and activating the resulting silver image.