Offset printing plate precursor and method for offset printing using the same
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United States of America Patent
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May 21, 2002
Grant Date -
N/A
app pub date -
Oct 21, 1999
filing date -
Oct 23, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An offset printing plate precursor comprising a substrate having provided thereon a layer containing a substance capable of absorbing radiant rays and converting the radiant energy to heat energy, and a thin layer, wherein printing is performed by following the steps of: (a) subjecting the printing plate precursor to irradiation with active light, (b) subjecting the printing plate precursor to irradiation with light/heat convertible radiant rays or heat treatment, to thereby imagewise distribute a hydrophilic area and a lipophilic area of the thin layer, and (c) bringing the thin layer into contact with printing ink to form a printing plate in which the lipophilic area has received the printing ink, to thereby perform offset printing.
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