Water soluble polymers as alcohol replacement in lithographic fo

Details Water soluble polymers as alcohol replacement in lithographic fo Water soluble polymers as alcohol replacement in lithographic fo

1989-04-03

1991-04-09

Bell, Mark L.

Compositions: coating or plastic

Coating or plastic compositions

Coating repellent

101451, C09K 318

Patent

active

050061682

ABSTRACT:
Isopropyl alcohol is partially or completely replaced in an acid fountain solution for lithographic printing by a hydroxypropylcellulose or similar polymer with a molecular weight below 100,000 where a 30% by weight solution of the polymer has a viscosity below 4000 cps at 25.degree.. Printing quality is improved and scumming is controlled when a hydrogen peroxide degraded hydroxypropylcellulose or hydrophobically modified hydroxyethylcellulose replaces alcohol in a fountain solution.

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