Process for the manufacture of a lithographic printing form by e

Details Process for the manufacture of a lithographic printing form by e Process for the manufacture of a lithographic printing form by e

1981-02-09

1983-06-14

Martin, Jr., Roland E.

Radiation imagery chemistry: process, composition, or product th

Electric or magnetic imagery, e.g., xerography,...

To produce printing surface

430125, 430309, 101457, 101DIG13, G03G 1326, G03G 1332

Patent

active

043883915

ABSTRACT:
Disclosed is a process for manufacturing a lithographic printing form by electrophotographic means, comprising the steps of uniformly charging an oleophilic photoconductive layer which is present on an electrically conductive hydrophilic layer support and which contains a photoconductor and a binder; image-wise exposing the charged photoconductive layer to produce a charge image; developing the charge image with toner to produce a toner image comprised of imaged areas and non-image areas; fixing the toner image; decoating the non-image areas of the photoconductive layer to bare the electrically conductive layer support; coating the bared areas of the layer support with a solution comprising a water-soluble, but hydrocarbon-insoluble film-forming polymer and a vinyl phosphonic acid compound; drying the coating solution to form a uniform coating; and removing the toner image by rinsing with a hydrocarbon composition containing aromatic portions in an amount of at least about 20% by weight. Also disclosed is an improved printing form made by this process.

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patent: 3121009 (1964-02-01), Giaimo, Jr.
patent: 3158476 (1964-11-01), Uhlig
patent: 3220832 (1965-11-01), Uhlig
patent: 3257203 (1966-06-01), Sus et al.
patent: 3276868 (1966-10-01), Uhlig
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patent: 3396020 (1968-08-01), Borchers
patent: 3399994 (1968-09-01), Watkinson
patent: 3438778 (1969-04-01), Uhlig
patent: 3745028 (1973-07-01), Rauner
patent: 4063948 (1977-12-01), Lind
patent: 4066453 (1978-01-01), Lind
patent: 4254196 (1981-03-01), Seeley et al.

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