Light sensitivbe copying layer containing a halide of...

Details Light sensitivbe copying layer containing a halide of... Light sensitivbe copying layer containing a halide of...

G - Physics

03

C

96/160

G03C 1/54 (2006.01) G03F 7/022 (2006.01) G03F 7/105 (2006.01)

Patent

CA 1046332

Abstract of the Disclosure This invention relates to an improvement in a light-sensitive copy- ing layer containing an ester or an amide of an o-naphthoquinone diazide sulfonic acid or carboxylic acid together with an organic dyestuff and which changes its color shade upon exposure to light, the improvement comprising that it contains, calculated on its total content of o-napthoquinone diazide compounds, 10 to 75 per cent by weight of a halide of o-napthoquinone diazide-4-sulfonic acid and, as the dyestuff, an organic compound capable of salt formation in a quantity of 1 to 50 per cent by weight, calculated on the same basis.

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