Method of fountainless lithography

Details Method of fountainless lithography Method of fountainless lithography

1976-02-12

1978-03-07

Newsome, John H.

Printing

Planographic

Processes of lithographic printing

96 29L, 101462, 101465, B41M 106, B41M 114

Patent

active

040773248

ABSTRACT:
A method of producing a lithographic printing master, novel masters and a method of printing therefrom are provided which obviate the need for an aqueous fountain solution. The process for printing comprises applying an ink and a solvent (which may or may not be in the ink) to an imaged master and transferring the resultant developed image to a receiver member. The nonimaged portions of said master are formed of an ink releasing solvent swellable elastomer selected from organohydrocarbon backbone polymers (which may or may not contain hetero atoms), copolymers and mixtures. The solvent is a fluid capable of swelling the nonimaged areas of said elastomer but not capable of dissolving the elastomeric imaged master. The solvent is added in an amount to diffuse into the nonimaged areas of the imaged master and form a substantially ink-free layer on the nonimaged areas of the master during inking and transferring of the inked image.

REFERENCES:
patent: 3209683 (1965-10-01), Greubel
patent: 3608483 (1971-09-01), Kaminstein
patent: 3620812 (1971-11-01), Boutle et al.
patent: 3677178 (1972-07-01), Gipe
patent: 3844994 (1974-10-01), Vijayendran
patent: 3901700 (1975-08-01), Yoerger et al.

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