Imaging cylinder containing heat sensitive thiosulfate polymer a

Details Imaging cylinder containing heat sensitive thiosulfate polymer a Imaging cylinder containing heat sensitive thiosulfate polymer a

1999-03-02

2000-10-24

Baxter, Janet

Radiation imagery chemistry: process, composition, or product th

Imaging affecting physical property of radiation sensitive...

Radiation sensitive composition or product or process of making

4302751, 430944, 101451, 101467, 2503161, G03C 1725

Patent

active

061365033

ABSTRACT:
An imaging member, such as a printing cylinder, is composed of a hydrophilic imaging layer formed from a heat-sensitive composition (for example, by spray coating) having a hydrophilic heat-sensitive polymer containing heat-activatable thiosulfate groups, and optionally a photothermal conversion material. Upon application of energy that generates heat, such as from IR irradiation, the polymer is crosslinked and rendered more hydrophobic. The exposed imaging member can be contacted with a lithographic printing ink and a fountain solution and used for printing with or without post-imaging wet processing. This imaging member is particularly useful for direct write imaging using IR lasers or thermal printing heads. In preferred embodiments, the imaging member is an on-press printing cylinder that is prepared, imaged and used on press.

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Digital Printing 2000 The Missing Inventions, Dan Gelbart, 474-IS&T's 49.sup.th Annual Conference.

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