Method of developing a heat-sensitive lithographic printing...

Details Method of developing a heat-sensitive lithographic printing... Method of developing a heat-sensitive lithographic printing...

2008-01-08

2008-01-08

Walke, Amanda C. (Department: 1752)

Radiation imagery chemistry: process, composition, or product th

Imaging affecting physical property of radiation sensitive...

Making printing plates

C430S270100, C430S303000, C430S309000, C430S401000, C430S434000, C430S448000, C430S494000, C430S944000, C430S945000

Reexamination Certificate

active

07316891

ABSTRACT:
A method of making a lithographic printing plate is disclosed which comprises the steps ofproviding a lithographic printing plate precursor comprising (i) a support having a hydrophilic surface or which is provided with a hydrophilic layer and (ii) a coating provided thereon which comprises hydrophobic thermoplastic polymer particles;exposing the coating to heat, thereby inducing coalescence of the thermoplastic polymer particles at exposed areas of the coating;developing the precursor by applying a gum solution to the coating, thereby removing non-exposed areas of the coating from the support.According to the above method, the plate precursor can be developed and gummed in a single step.

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