Printing fountain solution

Details Printing fountain solution Printing fountain solution

1984-11-21

1987-02-10

Hayes, Lorenzo B.

Printing

Planographic

Processes of lithographic printing

106 2, C09D 520

Patent

active

046415793

ABSTRACT:
An improved fountain solution and viscosity control thereof is disclosed for lithographic printing using dampening systems of the continuous type, such as a Dahlgren system. The fountain solution utilizes a viscosity imparting or thickening agent for viscosity control, such as hydroxypropylmethyl cellulose, to effect a desired viscosity. A thickened solution is prepared, and this solution is added to an aqueous solution including an ionic etch to provide a fountain solution having a viscosity of between about 20 seconds and about 22 seconds as measured in a #1 Shell cup.

REFERENCES:
patent: 3547632 (1970-12-01), Nadeau
patent: 3745028 (1973-07-01), Rauner
patent: 4186250 (1980-01-01), Garrett, et al.
patent: 4200688 (1980-04-01), Garrett, et al.
"Trends in Litho Dampening Systems Show Vast Improvements in Designs", by John MacPhee, Graphic Arts Monthly, Apr. 1981, pp. 35-42.

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