Printing – Planographic – Lithographic plate making – and processes of making or using...
Patent
1973-04-13
1977-04-12
Coughenour, Clyde I.
Printing
Planographic
Lithographic plate making, and processes of making or using...
96 33, 96 363, 101150, 1014011, 101453, 427262, 427373, 427387, B41N 114, B41C 110
Patent
active
040168140
ABSTRACT:
A novel printing master and method for producing the same is disclosed which comprises the coating of a suitable substrate with an uncured silicone gum composition containing an activating proportion of a "blowing" or "foaming" agent. A particulate image pattern such as a toner image pattern, is transferred to the uncured silicone layer, followed by curing of the gum to an elastomeric ink releasable film. Activation of the "blowing" agent occurs during curing of the silicone to cause imagewise "foaming" of the silicone layer. After removal of the deposited image pattern, a "foamed" image is formed which is ink receptive and provides an imaged printing master suitable for use without a need for aqueous dampening solutions to provide ink release in non-imaged areas of the master.
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The Journal of Photographic Science, vol. 18, No. 1, Jan.-Feb. 1970, pp. 4-7, Uhlig.
Crystal Richard G.
Schank Richard L.
Coughenour Clyde I.
MacKay Donald M.
O'Sullivan James P.
Ralabate James J.
Xerox Corporation
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