Process for preparing waterless lithographic masters

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

1973-12-27

1976-04-20

Coughenour, Clyde I.

Printing

Intaglio

1011284, 101467, 1014011, 427270, 427387, 156 4, B41M 110

Patent

active

039510603

ABSTRACT:
A process for preparing a waterless lithographic printing master is provided. A suitable substrate which is preferably ink accepting is coated with a silicone which is curable at low or ambient temperature and which contains in addition to its own catalyst a high temperature catalyst. The silicone is then cured at least on its surface to render it nontacky. A particulate image pattern is deposited on the cured silicone which pattern comprises a material which at elevated temperature combines with the high temperature catalyst to degrade the cured silicone below said image pattern, the composite heated to degrade the silicon below the image pattern and render the nonimaged areas ink releasing to the extent the silicone was not previously rendered ink releasing, and the particulate image pattern and preferably the degraded silicone removed beneath said pattern to reveal the ink accepting substrate in image configuration.

REFERENCES:
patent: 2708289 (1955-05-01), Collings
patent: 3002848 (1961-10-01), Clark
patent: 3215527 (1965-11-01), Johnson
patent: 3243410 (1966-03-01), McVannel
patent: 3322537 (1967-05-01), Giaimo
patent: 3368483 (1968-02-01), Storms
patent: 3479320 (1969-11-01), Bostick
patent: 3487123 (1969-12-01), Bauer et al.
patent: 3682633 (1972-08-01), Curtin
patent: 3833401 (1974-09-01), Ingram

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