Procedure to reproduce visual issues of a major environment in a copying media. (Machine-translation by Google Translate, not legally binding)

摘要

A method for visually reproducing matters of a principal medium in a copying means, characterized in that it comprises the steps of forming a copying means having, on one of its surfaces at least, a water-soluble compound of a metal chosen in the group consisting of vanadium, with a valence number of at least 4, titanium, with a valence number of 4, molybdenum and tungsten, these two with a valence number of 6, forming a developer liquid containing a compound organic chosen from the group consisting of dihydroxybenzene, ring-substituted dihydroxybenzenes, dihydroxynaphthalenes and substituted dihydroxynaphthalenes in the ring and in which two of the hydroxyl groups are on adjacent carbon atoms in the ring, and contacting said water-soluble compound, on said surface of said copying means, with said developer liquid, only in areas determined by the principal medium l, to form on said surface of said copying means a copy in visual form of the matter. (Machine-translation by Google Translate, not legally binding)