Method of controlling surface roughness of a flexographic printing plate
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United States of America Patent
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Mar 22, 2016
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N/A
app pub date -
Nov 15, 2013
filing date -
Jul 14, 2011
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Abstract
A method of controlling surface roughness of a flexographic printing element during thermal processing is provided. An imaged and exposed relief image printing element is thermally developed to remove the portions of at least one layer of photopolymer that are not crosslinked and cured by using a blotting material. The blotting material is separated from the at least one layer of photopolymer. Thereafter, a smooth material is inserted between the surface of the at least one layer of photopolymer and the blotting material, applying pressure and heat. In the alternative, after the relief image printing element is removed from the thermal processor, a polymeric film is laminated onto the relief image printing element using heat and pressure. The surface roughness of the relief image printing element is reduced, allowing for increased solid ink density on solid areas printed using the relief image printing element.
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