Process for preparing waterless lithographic masters

Details Process for preparing waterless lithographic masters Process for preparing waterless lithographic masters

1973-10-19

1976-06-08

Brown, J. Travis

Gas separation: apparatus

Magnetic separating means

96 33, 96 363, 101463, 427258, 427302, 427342, G03F 702

Patent

active

039619478

ABSTRACT:
A novel method of preparing a waterless lithographic master and a method of printing therefrom are provided. To prepare the printing master, a suitable ink accepting substrate such as aluminum, paper or plastic, is coated with a silicone gum curing catalyst, preferably suspended in a hydrophilic binder. A barrier fusable particulate hydrophobic image pattern is then deposited on said coated substrate and fused to mask said curing catalyst in the image areas. The substrate is then coated with an uncured silicone gum, preferably as an aqueous emulsion so that the gum does not adhere to the hydrophobic image pattern. The silicone gum is then cured in the nonimage areas to selectively provide ink receptive image areas and ink releasing nonimage areas. The method of printing comprises the additional steps of applying ink to the imaged master and contacting the inked master with an image receiving surface to thereby transfer the inked image.

REFERENCES:
patent: 3215527 (1965-11-01), Johnson
patent: 3287152 (1966-11-01), Alles et al.
patent: 3385699 (1968-05-01), Honjio
patent: 3511178 (1970-05-01), Curtin
patent: 3677178 (1972-07-01), Gipe
patent: 3775115 (1973-11-01), Sorkin et al.
patent: 3869285 (1975-03-01), Kondo et al.

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