Thermal transfer donor and receptor with silicated surface for lithographic printing applications
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United States of America Patent
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Oct 24, 1995
Grant Date -
N/A
app pub date -
Oct 11, 1994
filing date -
Oct 11, 1994
priority date (Note) -
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Abstract
A thermal transfer system for transferring material in an imagewise manner by means of thermal transfer printing from a donor element to an image receiving element is used to prepare printing plates. In one construction, a donor element, which is prepared by coating a photoinitiator (and optionally a sensitizer) in a binder on a backing material, is used with an image receiving element, which is prepared by coating a photopolymer (and optionally a sensitizer) on a substrate having a microporous hydrophilic crosslinked silicated surface. In an alternative construction, a donor element, which is prepared by coating a sensitizer in a binder on a backing material, is used with an image receiving element, which is prepared by coating a photopolymer and photoinitiator on a substrate having a microporous hydrophilic crosslinked silicated surface. In yet another construction, a donor element, prepared by coating a thermal transfer layer containing a photopolymer, a photoinitiator and/or a sensitizer on a backing material, is used with an image receiving element having a microporous hydrophilic crosslinked silicated surface.
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