Process for the production of a laminar article.

摘要

A process for the production of a laminar article containing on a sheet support a silver image produced by the silver complex diffusion transfer process in a layer containing development nuclei, wherein said image is heated in a lamination procedure and protected thereby with a protective thermoplastic resin layer or sheet that covers said supported silver image, characterized in that said layer containing development nuclei contains said silver image during the heat-lamination procedure in the presence of one or more black-toning agents which are heterocyclic thione compounds or tautomeric thiol representatives thereof acting as black-toning agents.