Process for producing negative copies by means of a material...

Details Process for producing negative copies by means of a material... Process for producing negative copies by means of a material...

G - Physics

03

F

96/219

G03F 7/20 (2006.01) G03F 7/022 (2006.01)

Patent

CA 1242920

ABSTRACT OF THE DISCLOSURE A process for producing negative relief copies is disclosed in which a light-sensitive material, comprising (1) a binder which is insoluble in water and soluble in aqueous-alkaline solutions and (2) a light-sensitive ester or amide of a 1,2-benzoquinone-2-diazide-4-sulfonic acid, a 1,2-benzoquinone-2-diazide-4-carboxylic acid, a 1,2-naphthoquinone-2-diazide-4-sulfonic acid, or a 1,2-naphthoquinone-2-diazide-4-carboxylic acid, is imagewise exposed, thereafter heated and, after cooling, exposed again without an original, and subsequently developed by means of an aqueous-alkaline developer. The disclosed process permits the production of negative copies with the aid of a material which yields positive copies when it is processed in a conventional manner.

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