Optical brightener containing positive working color proofing sy

Details Optical brightener containing positive working color proofing sy Optical brightener containing positive working color proofing sy

1988-08-29

1989-09-26

Michl, Paul R.

Radiation imagery chemistry: process, composition, or product th

Diazo reproduction, process, composition, or product

Process producing multiple image

430142, 430145, 430192, 430293, 430257, 430195, 430262, 430165, 430166, 430933, G03C 720, G03C 1112, G03C 518

Patent

active

048699934

ABSTRACT:
This invention relates to positive working photosensitized sheet constructions which, upon exposure to an actinic radiation source through a screened image, can accurately reproduce said image. The construction is useful as a color proofing film which can be employed to predict the image quality from a lithographic printing process. The element is composed of a substrate, colored photosensitive layer and adhesive layer. The adhesive layer contains an optical brightener compound which reduces residual yellow staining derived from the naphthoquinone diazide sensitizer.

REFERENCES:
patent: 3854950 (1974-12-01), Held
patent: 4304839 (1981-12-01), Cohen et al.
patent: 4413091 (1983-11-01), Iwasaki et al.
patent: 4659642 (1987-04-01), Platzer et al.
patent: 4734356 (1988-03-01), Bauer et al.

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