Lithographic photosensitive printing plate comprising a photoconductor and a naphtho-quinone diazide sulfonic acid ester of a phenol resin
AssigneeKonica Corporation
InventorsKatsura Hirai, Yasuo Kojima, Kiyoshi Goto
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Abstract
A photosensitive lithographic printing plate comprises a conductive support and provided thereon, a photoconductive layer of a composition comprising a photoconductor and an esterified compound of o-naphtho-quinonediazide sulfonic acid with a phenol resin, the phenol resin being a polycondensation compound of a monovalent phenol with an aldehyde or a ketone, and the content of the o-naphthoquinonediazide sulfonic acid residue being 0.4.times.10.sup.-3 to 3.0.times.10.sup.-3 mole per gram of the photoconductive layer.
Claims14
A photosensitive lithographic printing plate comprising a conductive support and provided thereon, a photoconductive layer of a composition comprising a photoconductor and an esterified compound of o-naphthoquinonediazide sulfonic acid with a phenol resin, wherein the phenol resin is a polycondensation compound of m-cresol or p-cresol with an aldehyde or a ketone, and the content of the o-naphthoquinonediazide sulfonic acid residue is 0.4.times.10.sup.-3 to 3.0.times.10.sup.-3 mole per gram of the photoconductive layer.
A photosensitive lithographic printing plate comprising a conductive support and provided thereon, a photoconductive layer of a composition comprising a photoconductor and an esterified compound of o-naphthoquinonediazide sulfonic acid with a phenol resin, wherein the phenol resin is a polycondensation compound of a monovalent phenol with an aldehyde or a ketone, the sulfonic acid group is present at the 4-position of the o-naphthoquinonediazide sulfonic acid and the content of the o-naphthoquinonediazide sulfonic acid is 0.4.times.10.sup.-3 to 3.0.times.10.sup.-3 mol per gram of the photoconductive layer.
Dependencies are inferred from the claim text.