Method for making lithographic printing plate

Radiation imagery chemistry: process – composition – or product th – Imaging affecting physical property of radiation sensitive... – Making printing plates

Reexamination Certificate

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Details

C430S309000, C430S434000, C430S435000, C430S494000, C430S944000, C430S945000

Reexamination Certificate

active

07063937

ABSTRACT:
A method for making a lithographic printing plate comprising the steps of: light-exposing to infrared radiation, a heat-sensitive presensitized plate of a positive-working mode for use in making a lithographic printing plate, said presensitized plate comprising a substrate and an image recording layer which is formed thereon and comprises a novolak resin containing xylenol as a monomer component and an infrared absorbing dye; and developing the light-exposed plate with an alkaline developing solution comprising at least one surfactant selected from the group consisting of anionic surfactants and amphoteric surfactants.

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