Method and substrate for the preparation of a printing plate

Details Method and substrate for the preparation of a printing plate Method and substrate for the preparation of a printing plate

2006-01-10

2006-01-10

Hirshfeld, Andrew H. (Department: 2854)

Printing

Planographic

Lithographic printing plates

C101S462000, C101S466000

Reexamination Certificate

active

06983693

ABSTRACT:
The invention relates to a method for the preparation of a printing plate comprises forming an oleophilic image on a substrate for a printing plate comprising a support having at least one hydrophilic layer on its surface, the oleophilic image being formed by inkjet printing an aqueous solution or aqueous colloidal dispersion of an anionic oleophilising agent on the surface of the support and drying the applied solution or dispersion, such that, on drying, the area of the surface to which the solution or dispersion was applied becomes lithographic ink-accepting, characterised in that the hydrophilic layer comprises a crosslinked cationic polymer.The invention further relates to a substrate for a printing plate comprising a support having at least one hydrophilic layer on its surface wherein the hydrophilic layer comprises a crosslinked cationic polymer.

REFERENCES:
patent: 4097645 (1978-06-01), Toyoda et al.
patent: 5217813 (1993-06-01), Roser et al.
patent: 5952104 (1999-09-01), Sugiyama et al.
patent: 6131514 (2000-10-01), Simons
patent: 6277498 (2001-08-01), Endo et al.
patent: 6393980 (2002-05-01), Simons
patent: 2002/0051931 (2002-05-01), Mori et al.
patent: 0 601 204 (1994-06-01), None
patent: 0 882 584 (1998-12-01), None
patent: 1 157 825 (2001-11-01), None
patent: 53-15905 (1978-02-01), None
JP Abstract 56-105960.

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