Protective coating material for lithographic printing plate

Details Protective coating material for lithographic printing plate Protective coating material for lithographic printing plate

1976-10-20

1978-06-20

Hayes, Lorenzo B.

Printing

Planographic

Lithographic plate making, and processes of making or using...

101451, 106 2, B41N 308

Patent

active

040955257

ABSTRACT:
A protective coating material for lithographic printing plate, which comprises pullulan or pullulan derivatives. Said material is superior to hitherto used gum arabic solution in the protection of the surface of lithographic printing plate against oxidation and scumming as well as in the ability to enhance the hydrophilic character of metallic surface of a non-image area.

REFERENCES:
patent: 2569488 (1951-10-01), Newman
patent: 3354824 (1967-11-01), Griffith et al.
patent: 3784390 (1974-01-01), Hijiya et al.
patent: 3870537 (1975-03-01), Hijiya et al.
patent: 3888809 (1975-06-01), Nakashio et al.

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