Method of using an offset lithographic combination master blanke

Details Method of using an offset lithographic combination master blanke Method of using an offset lithographic combination master blanke

1976-07-23

1977-07-12

Coughenour, Clyde I.

Printing

Planographic

Processes of lithographic printing

1014011, 101426, 101454, 101460, 428909, B41M 106, B41C 110

Patent

active

040346714

ABSTRACT:
A combination master/blanket printing sheet for use with a lithographic offset duplicating press includes a master layer comprising material having hydrophilic properties which is imagable to provide pre-selected oleophilic areas for receipt of printing inks and a blanket layer of hydrophobic-oleophilic material suitable for receiving and carrying thereon an inked image transferred thereto by contact with a member carrying such image. In a preferred embodiment of the printing sheet the master and blanket layers are applied by coating or other suitable techniques to opposite surfaces of a base or support layer. The printing sheet is usable in the offset printing process both as a "master" sheet, when properly imaged on the master layer, and a "blanket".

REFERENCES:
patent: 2020479 (1935-11-01), Sites
patent: 2042003 (1936-05-01), Huebner
patent: 2048964 (1936-07-01), Osborn
patent: 2129071 (1938-09-01), Rowell
patent: 2178259 (1939-10-01), Kjell
patent: 2348943 (1944-05-01), Wescott

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