INDANONE DERIVATIVES WITH A SULPHAMYL GROUP IN THE AROMATIC RING AS DIR COMPOUNDS

摘要

In a color photographic material wherein by color development there are produced either non-diffusing image dyes or diffusing image dyes (the latter being transferred to an image-receiving layer) the color development is controlled by means of non-diffusing thioether compounds which on color development release a diffusing mercapto compound but do not themselves form a dye. The mercapto compound inhibits the development of the silver halide and the thioether compound has the formula R1 = hydrogen or alkyl with 1-3 carbon atoms R2 = alkyl with up to 22 carbon atoms an aralkyl group or an aryl group, and the group -S-Y is split off during color development and forms a mercaptane, e.g. 5-mercapto-1-phenyltetrazole, which inhibits the development.