G - Physics – 03 – G
Patent
G - Physics
03
G
96/3
G03G 13/28 (2006.01)
Patent
CA 1146790
ABSTRACT OF THE DISCLOSURE Disclosed is a process for manufacturing a lithographic printing form by electrophotographic means, comprising the steps of uniformly charging an oleo- philic 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 com- prising a water soluble, but hydrocarbon-insoluble film-forming polymer and a vinyl phosphonic acid com- pound; 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.
370005
Fetherstonhaugh & Co.
Hoechst Aktiengesellschaft
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