Lithographic printing plate and treating liquids for such plate

Details Lithographic printing plate and treating liquids for such plate Lithographic printing plate and treating liquids for such plate

1998-04-01

2000-01-25

Schilling, Richard L.

Radiation imagery chemistry: process, composition, or product th

Transfer procedure between image and image layer, image...

Diffusion transfer process, element, or identified image...

430227, 430230, 430232, 430229, 101451, 101457, 101465, G03F 707, G03C 806, G03C 828, G03C 836

Patent

active

060176733

ABSTRACT:
A lithographic printing plate that works according to the silver salt diffusion transfer reversal process is disclosed. The lithographic properties of said plate can be improved by incorporating a hydrophilic amphoteric block copolymer, comprising a non-ionic block of acrylic units with pendant nitrile groups and an acrylamid(in)e block which comprises units with pendant basic and acidic groups. The hydrophilic amphoteric block copolymer is preferentially present in the image receiving layer of the lithographic printing plate. In an alternative embodiment, said block copolymer may be present in a treating solution used for processing said plate or applied onto said plate while printing. The hydrophilicity of the printing plate's surface is improved without deteriorating the ink-acceptance in the printing areas.

REFERENCES:
patent: 4033919 (1977-07-01), Lawson
patent: 4116896 (1978-09-01), Garrett et al.
patent: 4186250 (1980-01-01), Garrett et al.
patent: 5236802 (1993-08-01), Yamano et al.
patent: 5437957 (1995-08-01), Yamano et al.
patent: 5707775 (1998-01-01), Deprez et al.

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