Compositions and methods for treating surface of lithographic pr

Details Compositions and methods for treating surface of lithographic pr Compositions and methods for treating surface of lithographic pr

1978-09-20

1980-12-09

Powell, William A.

Adhesive bonding and miscellaneous chemical manufacture

Delaminating processes adapted for specified product

Delaminating in preparation for post processing recycling step

101451, 101465, 106 2, 156905, 252 792, 252 794, B41M 100, B41M 500, C09D 520, C23F 100

Patent

active

042382793

ABSTRACT:
A liquid composition for treating surface of lithographic printing plates, especially etching liquid and dampening liquid which essentially consists of (a) phosphoric acids, (b) nitric acid or salts thereof and (c) nitrous acid or salts thereof and which has all characteristics required for treating liquids used for offset printing, has excellent ability of rendering the non-image areas oil-unreceptive and has rust resistance for all metals. This composition may additionally contain aminopolycarboxylates, polyol compounds and inorganic fine particles.

REFERENCES:
patent: 2393875 (1946-01-01), VanDusen
patent: 2705191 (1955-03-01), Jumeh
patent: 3575747 (1971-04-01), Cohn
patent: 3645790 (1972-02-01), Burden
patent: 3829319 (1974-08-01), Suzuki et al.
patent: 4100096 (1978-07-01), Rubin

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