Lithographic printing plate utilizing aluminum substrate with photosensitive layer containing o-naphthoquinonediazide sulfonic acid ester, alkali soluble resin and select additive
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United States of America Patent
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Aug 24, 1993
Issued Date -
N/A
app pub date -
Oct 19, 1992
filing date -
May 31, 1988
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Expired
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Abstract
There are disclosed a photosensitive composition which comprises: (1) an o-naphtoquinonediazide compound; (2) an alkali soluble resin; and (3) any one selected from the groups consisting of: (a) an ester compound of a polyoxyalkylene sorbitol fatty acid and/or an ether compound of the fatty acid, (b) an alkylene oxide adduct of castor oil, hardened castor oil, lanolin alcohol, beeswax, phytosterol or phytostanol, and (c) at least one activator selected from the group consisting of polyoxypropylene alkyl ethers, polyoxypropylene alkylphenyl ethers and polyoxypropylene alkyl esters;. and a photosensitive lithographic printing plate which comprises a support; and a photosensitive layer formed by applying the above photosensitive composition.
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