| 摘要 |
A method of making a relief image printing element from a liquid photopolymer composition is described. The method includes the steps of (1) casting a liquid photopolymer layer onto a cover sheet and at least substantially simultaneously placing a hacking sheet onto the liquid photopolymer layer; (2) preliminarily exposing the liquid photopolymer layer to actinic radiation to create at least one island of solid photopolymer in the liquid photopolymer layer where it is desirable to laser engrave a relief image; (3) reclaiming uncured liquid photopolymer from the relief image printing element; (4) processing the at least one island of solid photopolymer to remove uncured liquid photopolymer; (5) exposing the at least one island of solid photopolymer to actinic radiation to fully cure the islands of solid photopolymer; and (6) laser engraving the at least one island of solid photopolymer to produce the relief image therein.
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