Deactivating device and method for lithographic printing plate

Details Deactivating device and method for lithographic printing plate Deactivating device and method for lithographic printing plate

2011-01-25

2011-01-25

Yan, Ren (Department: 2854)

Printing

Planographic

Lithographic plate making, and processes of making or using...

C101S401100

Reexamination Certificate

active

07874249

ABSTRACT:
A device as well as method for deactivating without developing an exposed lithographic printing plate is disclosed. The device comprises a structure for providing a deactivating agent that is capable of deactivating without developing the plate. The plate comprises on a substrate a photosensitive layer capable of hardening (for negative plate) or solubilization (for positive plate) upon exposure to a radiation, and becoming incapable of or having reduced rate of hardening or solubilization after contacting with a deactivating agent. The deactivated plate is safe or has better stability at room lighting, and can be handled under room lighting before and during development. The development can be on press with ink and/or fountain solution or off press with a liquid developer.

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