Material and process for retouching offset plates

Details Material and process for retouching offset plates Material and process for retouching offset plates

1987-03-03

1988-01-05

Lusignan, Michael R.

Coating processes

Frictional application

101466, 401 1, 427140, 430302, 430329, 524605, B41M 526, A46B 1108, B32B 3500, G03C 500

Patent

active

047175834

ABSTRACT:
A material is provided for adding image areas to grained lithographic offset plates. A polyester resin with imbedded fibers changes the surface characteristics of the printing plate from an oily ink repellant condition to an oily ink receptive condition. In a preferred embodiment, a resin of PBT or PET is provided in generally solid form which may be shaped to a desired form for application to the plate. Corrections may be made to a plate either on or off a printing press and at any stage of the print run.

REFERENCES:
patent: 4150623 (1929-04-01), Hamilton
patent: 4396703 (1983-08-01), Matsumoto et al.

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