Presensitized negative working waterless planographic printing plate with amorphous silicic acid interlayer and process of making and using
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United States of America Patent
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-
Jun 27, 1989
Grant Date -
N/A
app pub date -
Aug 20, 1987
filing date -
Aug 23, 1986
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A presensitized printing plate suitable for waterless planographic printing is disclosed which comprises a layer support, a radiation-sensitive layer containing (a) a compound possessing at least one C--O--C bond, which can be split by acid (b) a compound forming a strong acid upon irradiation, and (c) a water-insoluble binder, an outer, ink-repellent, crosslinked silicone elastomer layer, and an intermediate layer comprising amorphous silicic acid by which the adhesion of the silicone elastomer layer to the radiation-sensitive layer is improved. The photosensitivity of this printing plate is considerably improved, as compared to known negative-working printing plates that can be used for waterless offset printing. The processes of making and using the presensitized printing plate are also disclosed.
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