Light-sensitive material and a process for producing...

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G - Physics

03

C

96/165, 96/219

G03C 1/52 (2006.01) G03F 7/016 (2006.01) G03F 7/022 (2006.01) G03F 7/20 (2006.01) G03F 7/26 (2006.01)

Patent

CA 1298510

ABSTRACT OF THE DISCLOSURE Disclosed is a light-sensitive material and a process for producing negative relief copies utilizing the light-sensitive material. The light-sensitive material comprises, as the light-sensitive compound, a 1,2-quinone diazide and a quarternary phosphonium com- pound. The light-sensitive material is imagewise exposed and heated. After cooling, the material is sub- jected again to an overall exposure, and then developed. By means of this light sensitive material and process, it is possible to produce negative copies from a material yielding positive copies when processed in the customary manner.

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