PROCESS FOR THE FORMATION OF LINEWORK OR HALFTONE MULTICOLOUR COLLOID PATTERNS

摘要

Process for forming a halftone multicolor pattern which comprises in sequence given the following steps: (1) scanningwise exposing a multicolor original attached to a rotating scanner drum to produce series of electrical signals that are fed into a computer, (2) exposing in a single scan separate black-and-white light-sensitive silver halide emulsion layer materials under the control of the computer in accordance with said signals, (3) developing the exposed silver halide emulsion layers with a hardening or tanning developing agent producing a negative or positive silver selection image that can be used as intermediate original in the production of a printing plate, a pattern of oxidized hardening developing agent being imagewise transferred during development from the emulsion layer onto a hardenable non-photosensitive colored gelatin layer originally carried on a temporary support or carried directly on a permanent support, (4) producing a colored relief image by wash-off processing of said colored gelating layer, and (5) assembling the colored relief images into a multicolor pattern on the same permanent support.