Photosensitive recording material for use in the production...

Details Photosensitive recording material for use in the production... Photosensitive recording material for use in the production...

G - Physics

03

C

96/6

G03C 1/00 (2006.01) G03F 7/115 (2006.01)

Patent

CA 1265694

ABSTRACT OF THE DISCLOSURE Disclosed are a novel photosensitive recording material and a method for using the recording material in the production of planographic printing plates. The recording material comprises a support and a negative- working photosensitive layer that contains a diazonium salt polycondensation product as the photosensitive compound and, in addition, a colorless inorganic pigment which is insoluble in water and organic solvents and which has an average particle diameter from 1 to 20 /um. The pigment is present in a quantity from 0.01 to 2% by weight, relative to the non-volatile constituents of the layer, and is evenly distributed in the layer. Due to the pigment content, a rough layer surface is formed, which has the effect of reducing the time required for creating a vacuum in a vacuum frame into which the recording material is mounted. The pre- sence of the pigment in the layer also produces an improved tonal rendering in the print obtained.

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