Process for preparing a flexographic printing plate from a photopolymerizable element
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United States of America Patent
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Jul 13, 2010
Grant Date -
Jul 20, 2006
app pub date -
Jan 31, 2006
filing date -
Apr 20, 2001
priority date (Note) -
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status (Latency Note)
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Abstract
This invention relates to a photosensitive element for use as a flexographic printing plate and a process for preparing the plate from the element. The photosensitive element has at least one photopolymerizable elastomeric layer that comprises a binder, a monomer, a photoinitiator, an onium salt, and a leuco dye. Upon exposure to actinic radiation, the onium salt and leuco dye react resulting in a change of color in polymerized portions of the photopolymerizable layer. The color change provides enhanced image color contrast in the photosensitive element.
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