Negative-toning imaging system with re-imaging capability using 4-(2'-nitrophenyl)-1,4-dihydropyridine compounds
AssigneeE. I. Du Pont de Nemours and Company
InventorMario Grossa
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Abstract
A process for the production of patterns on a substrate bearing a layer of a negative-working, light-sensitive composition comprising at least one 1,4-dihydropyridine compound substituted in the 4 position by a 2'-nitrophenyl ring which becomes tacky and tonable on exposure to actinic radiation, comprising the steps of: (a) exposing said light-sensitive layer imagewise to actinic radiation whereby tacky areas are formed, and, (b) toning said exposed tacky areas with finely divided powders.
Claims8
Process for the production of patterns on a substrate bearing a layer of a negative-working, light-sensitive composition comprising at least one 1,4-dihydropyridine compound substituted in the 4 position by a 2'-nitrophenyl ring which becomes tacky and tonable on exposure to actinic radiation, comprising the steps of:
- (a) exposing said light-sensitive layer imagewise to actinic radiation whereby tacky areas are formed, and,
- (b) toning said exposed tacky areas with finely divided powders.
Dependencies are inferred from the claim text.