Method of Improving Print Performance in Flexographic Printing Plates
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United States of America Patent
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Issued Date -
Feb 1, 2018
app pub date -
Mar 20, 2017
filing date -
Oct 1, 2009
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Abstract
A method of making a relief image printing element from a photosensitive printing blank is provided. A photosensitive printing blank with a laser ablatable layer disposed on at least one photocurable layer is ablated with a laser to create an in situ mask. The printing blank is then exposed to at least one source of actinic radiation through the in situ mask to selectively cross link and cure portions of the photo curable layer. Diffusion of oxygen into the at least one photocurable layer is limited during the exposing step and preferably at least one of the type, power and incident angle of illumination of the at least one source of actinic radiation is altered during the exposure step. The resulting relief image comprises dots and a dot shape that provide optimal print performance on various substrates, including corrugated board.
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