Dry planographic printing plate and preparation thereof

Details Dry planographic printing plate and preparation thereof Dry planographic printing plate and preparation thereof

B - Operations, Transporting

41

N

101/61

B41N 1/00 (2006.01) G03F 7/075 (2006.01)

Patent

CA 1164267

ABSTRACT OF THE DISCLOSURE A presensitized planographic printing master plate is provided herein requiring no dampening water for use in negative work. The plate comprises a base substrate, a light releasing photosensitive layer overlying the base substrate and a silicone rubber layer overlying the photosensitive layer. When the printing master plate is exposed through a negative film and then is treated with a developer, only the silicone rubber layer overlying the exposed photosensitive layer is removed, while the photosensitive layer remains as it is to form an image area. Dampening water is not required when printing is carried out.

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