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Abstract

Abstract 2. A PHOTOSENSITIVE ELEMENT COMPRISING A SUPPORT CONTAINING A COMPOSITION COMPRISING A. AN ESSENTIALLY COLORLESS, OXIDIZABLE, NITROGEN-CONTAINING, ORGANIC COLOR GENERATOR, WHICH WHEN CONTAINED IN SAID COMPOSITION, IS STABLE TO OXIDATION BY ATMOSPHERIC OXYGEN UNDER NORMAL ROOM AND STORAGE CONDITIONS BUT WHICH IS OXIDIZABLE TO A COLORED MATERIAL AND B. A PHOTO-OXIDANT WHICH IS CAPABLE OF OXIDIZING SAID COLOR GENERATOR TO A COLORED MATERIAL WHEN SUBJECTED TO ACTINIC RADIATION, SAID PHOTO-OXIDANT HAVING A FORMULA SELECTED FROM THE GROUP CONSISTING OF: R-O-N(+)<(-Z-)(-R1) X(-) AND R-O-N<(-Z)(-R8) WHEREIN: R1 IS SELECTED FROM THE GROUP CONSISTING OF: A. A METHINE LINKAGE TERMINATED BY A HETEROCYLIC NUCLEUS OF THE TYPE CONTAINED IN CYANINE DYES, (B. AN ALKYL RADICAL,) B. (C.) AN ANILINOVINYL RADICAL, (D. A HYDROGEN ATOM, E. AN ARYL RADICAL, F. AN ALDEHYDE GROUP,) AND C. (G.) A STYRYL RADICAL; R8 IS SELECTED FROM THE GROUP CONSISTING OF: A. A METHINE LINKAGE TERMINATED BY A HETEROCYCLIC NUCLEUS OF THE TYPE CONTAINED IN MEROCYANINE DYES AND B. AN ALLYLIDENE RADICAL SELECTED FROM THE GROUP CONSISTING OF A CYANOALLYLIDENE RADICAL, AN ALKYLCARBOXYALLYLIDENE RADICAL AND AN ALKYLSULFONYLALLYLIDENE RADICAL; (R) R1 IS SELECTED FROM THE GROUP CONSISTING OF: A. AN ALKYL RADICAL AND B. AN ACYL RADICAL; (X) X- IS AN ACID ANION, AND Z REPRESENTS THE ATOMS NECESSARY TO COMPLETE A FIVE- TO SIX-MEMBERED HETEROCYCLIC NUCLEUS.

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