| 摘要 |
It has been found that excellent quality photopolymer printing plates having resistance to alcohol-based inks can be prepared by (a) spreading a photopolymer composition comprising a chain extended, liquid, terminally olefinically unsaturated polymer; from about 1% to about 50% by weight based on the weight of the polymer of at least one ethylenically unsaturated monomer; from about 0.1% to about 10% by weight based on the weight of the polymer of photoinitiator; and from about 0.01% to about 2% by weight based on the weight of the polymer of a stabilizer on a support to form a photopolymer element, (b) exposing to actinic light selected areas of said photopolymer composition on said support until substantial cross-linking takes place in the exposed areas without significant cross-linking in the unexposed areas, and (c) removing the unexposed areas of photopolymer composition by washing the plate with an aqueous detergent solution.
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