Producing planographic printing plate requiring no dampening wat

Details Producing planographic printing plate requiring no dampening wat Producing planographic printing plate requiring no dampening wat

1973-05-14

1976-01-20

Klein, David

Gas separation: apparatus

Electric field separation apparatus

Electrode cleaner, apparatus part flusher, discharger, or...

96 49, 96 75, 96 91R, G03F 702

Patent

active

039334953

ABSTRACT:
A presensitized planographic printing plate which can be used in both negative and positive work comprising a support, a layer formed on the support of a photosensitive substance prepared by the reaction at a pH of not more than 7.5 of a diazonium compound with a coupling agent, e.g., hydroxybenzophenone, and a layer formed on the photosensitive layer of a "one-package" silicone rubber curable at room temperature. A planographic printing plate per se is produced by imagewise exposing the presensitized plate through a negative or positive film, and treating the exposed plate with a treating liquid capable of removing those portions of the presensitized plate which correspond to the image area of the original. Dampening water is not required when printing is carried out using the resulting printing plate.

REFERENCES:
patent: 3046116 (1962-07-01), Schmidt
patent: 3300309 (1967-01-01), Chu
patent: 3511178 (1970-05-01), Curtin
patent: 3591575 (1971-07-01), Golda
patent: 3615538 (1971-10-01), Peters et al.
patent: 3669660 (1972-06-01), Golda et al.
patent: 3677178 (1972-07-01), Gipe
The Lithographers Manual, 4th ed., 2nd ptg., 1970 - Shapiro, C. (ed.), pp. 10:20-10:22.
G. E. Silicones, CDS-129 G.G.E. Silicone Products Dept., Waterford, N.Y., p. 5.

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