Planographic printing plate precursor

Details Planographic printing plate precursor Planographic printing plate precursor

2005-11-01

2005-11-01

Gilliam, Barbara L. (Department: 1752)

Radiation imagery chemistry: process, composition, or product th

Imaging affecting physical property of radiation sensitive...

Radiation sensitive composition or product or process of making

C430S283100, C430S284100, C430S286100, C430S287100, C430S288100

Reexamination Certificate

active

06960422

ABSTRACT:
The present invention discloses a negative planographic printing plate precursor for infrared exposure having an image recording layer containing an infrared absorbing agent, a radical generator and a radical polymerizable compound on a support characterized in that a sensitivity ratio (S1/S60) of a sensitivity (S60) when developed 60 minutes after infrared laser exposure to a sensitivity (S1) when developed one minute after exposure is at least 0.5 and less than 1.0 in the image recording layer. It is preferable that this composition contains a polymer compound which has a functional group having high radical reactivity and can be dissolved or swollen in water or an aqueous alkali solution.

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