bildempfangsmaterial for silbersalzdiffusionsübertragungsverfahren

摘要

Image receiving layer for use in the silver diffusion transfer process, comprises a support bearing a layer composed of at least two surfaces. - The first made from a polymer permeable to alkali and contg. the silver precipitation nuclei, the second made from a polymer hydrolysable to an alkali permeable polymer and contg. a diffusible reagent which is designed to modify the photographic properties of the transfer image formed on the surface of the alkali permeable polymer. - The hydrolysable polymer is next to the support and prefd. are cellulose esters, polyvinyl esters and polyvinyl acetals. - The first layer is pref. regenerated cellulose. - The reagent used is a mercapto substd. compd. partic. 1 phenyl-5-mercapto tetrazole and imidazolidine thiono. - Improved image tone and stability result.