Heated diffusion transfer using leucophthalocyanines

Claim 1

A PROCESS FOR THE PRODUCTION OF A NON-LATERALLY REVERSED PHOTOGRAPHIC IMAGE WHICH COMPRISES: (A) EXPOSING A LIGHT-SENSITIVE SILVER HALIDE EMULSION LAYER UPON A SUPPORT TO AN ORIGINAL TO BE REPRODUCED, SAID LIGHT-SENSITIVE LAYER CONTAINS A 3-PYRAZOLIDONE DEVELOPING AGENT IN AN AMOUNT BETWEEN 0.1 AND 2.0 G. PER SQUARE METER OF THE LIGYT-SENSITIVE LAYER; (B) CONTACTING THE EXPOSED LAYER WITH A LIGHT-SENSITIVE TRANSFER MATERIAL WHICH CONTAINS, IN AN AMOUNT BETWEEN 0.01 AND 1.0 G. PER SQUARE METER OF THE TRANSFER MATERIAL, A LEUCOPHTHALOCYANINE THAT IS AT MOST ONLY SLIGHTLY COLORED AND IS COMPOSED OF 4 ISOINDOLENINE UNITS WHICH ARE ARRANGED IN A TRUE PHTHALOCYANINE STRUCTURE AND WHICH PRODUCE ON REDUCTION A PHTHALOCYANINE DYE; (C) HEATING THE EXPOSED LAYER AND THE TRANSFER MATERIAL WHILE IN INTIMATE CONTACT WITH EACH OTHER TO A TEMPERATURE BETWEEN 100 AND 200*C. TO CAUSE THE EXPOSED PORTIONS OF THE LIGHT-SENSITIVE LAYER TO BE DEVELOPED TO FORM A SILVER IMAGE, WHILE THE DEVELOPER COMPOUND AT THE UNEXPOSED PORTIONS OF THE LIGHT-SENSITIVE LAYER IS TRANSFERRED INTO THE TRANSFER MATERIAL TO PRODUCE A NON-LATERALLY REVERSED VISIBLE PHTHALOCYANINE DYE IMAGE BY REDUCTION OF THE LEUCOPHTHALOCYANINE IN THE TRANSFER MATERIAL; (D) SEPARATING THE DEVELOPED LAYER FROM THE TRANSFER MATERIAL.