| 摘要 |
<p>Production of printing plate by direct casting from matrix comprises the prepn. of the matrix by (A) submitting a photohardening mixture of actinic radiation to harden the mixture selectively in the exposed areas, the mixture containing a polyene, having at least two reactive unsaturated C/C-bonds per molecule, and a polythiol cpd. with at least two thiol radicals per molecule, the functionality of the unsatd. C/C bonds in the polyene and the thiol radicals in the polythiol being >4, and (B) removing the unhardened regions so that the hardened regions remain as polymeric matrix.</p> |
