Developing solution for heat-sensitive lithographic printing...

Radiation imagery chemistry: process – composition – or product th – Imaging affecting physical property of radiation sensitive... – Finishing or perfecting composition or product

Reexamination Certificate

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C430S302000, C101S465000, C101S467000

Reexamination Certificate

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07147995

ABSTRACT:
An alkaline developing solution for development of a heat-sensitive presensitized plate of positive-working mode for use in making a lithographic printing plate, which developing solution comprises a linear-type alkyleneoxide adduct and a branched-type alkyleneoxide adduct; a method for preparing a lithographic printing plate comprising the steps of light-exposing to infrared radiation, a heat-sensitive presensitized plate of positive-working mode for use in making a lithographic printing plate, said presensitized plate having an image recording layer which comprises an IR-absorbing dye on a substrate, and developing the light-exposed plate with the above alkaline developing solution.

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patent: 6364544 (2002-04-01), Sasayama et al.
patent: 6919166 (2005-07-01), Takamiya
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patent: 2000-32178 (2000-11-01), None
European Patent Office Search Report.

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