Method of processing overcoated lithographic printing plate

Details Method of processing overcoated lithographic printing plate Method of processing overcoated lithographic printing plate

2011-07-12

2011-07-12

Kelly, Cynthia (Department: 1722)

Radiation imagery chemistry: process, composition, or product th

Imaging affecting physical property of radiation sensitive...

Making printing plates

C430S309000, C101S450100

Reexamination Certificate

active

07977031

ABSTRACT:
A method of processing an on-press developable lithographic printing plate involves the removal of overcoat by brushing or rubbing while in contact with water or an aqueous solution after imagewise exposure and before on-press development. The plate comprises a substrate, an on-press ink and/or fountain solution developable photosensitive layer, and a water soluble or dispersible overcoat. Preferably, the overcoat is incapable of being completely removed with ink and/or fountain solution on a lithographic press during roll up. Such a method allows the use of more durable overcoat for on-press developable plate.

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