Actinically imageable and infrared heated printing plate
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United States of America Patent
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Apr 26, 2005
Grant Date -
Mar 20, 2003
app pub date -
Sep 16, 2002
filing date -
Jan 12, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A negative-working lithographic printing plate has a coating which is imaged by heating an area of the coating with an infrared laser and actinically reacting the coating in the heated area with ultraviolet or visible radiation. The coating contains an infrared absorber but the coating is not imageable by infrared radiation or by the heat generated. The imaging time is reduced since the actinic reaction rate is increased at the elevated temperature.
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