Process for the preparation of planographic printing forms...

Details Process for the preparation of planographic printing forms... Process for the preparation of planographic printing forms...

G - Physics

03

C

96/161, 96/2

G03C 1/54 (2006.01) G03F 7/021 (2006.01) G03F 7/20 (2006.01)

Patent

CA 1103507

PROCESS FOR THE PREPARATION OF PLANOGRAPHIC PRINTING FORMS BY MEANS OF LASER BEAMS Abstract of the Disclosure This invention relates to an improvement in the process for the preparation of a planographic printing form wherein a re- cording material comprising a support of anodically oxidized aluminum with an oxide layer weighing at least 3 grams per square meter and a light-sensitive recording layer on the oxide layer is imagewise irradiated with a laser beam, thus rendering the irradiated portions of the recording layer oleophilic and/or insoluble, and the non-irradiated areas of the recording layer are then removed with a developer liquid, the improvement comprising employing a recording layer which comprises a negative-working, light-hardenable, water-soluble diazo compound.

306161

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