Method of imaging of lithographic printing plates using laser ablation
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United States of America Patent
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Nov 25, 1997
Grant Date -
N/A
app pub date -
Sep 24, 1996
filing date -
Mar 12, 1996
priority date (Note) -
Expired
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Abstract
A lithographic printing plate is comprised of an anodized aluminum support having thereon an oleophilic image-forming layer comprising an infrared-absorbing agent dispersed in a film-forming cyanoacrylate polymer binder. The plate is imagewise exposed to a focused high-intensity infrared laser beam which removes the oleophilic image-forming layer by thermal ablation to thereby reveal the underlying hydrophilic support surface. The cyanoacrylate polymers provide superior performance due to their combination of low decomposition temperature, good ink receptivity, good adhesion to the support and good wear characteristics.
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