Patent · US Active

Method for providing lithographic printing plates

US9962923B2 · kind B2 · utility

1Cited by

3References

23Claims

0Family size

Assignee

Agfa NV · BE

Inventors

Peter Hendrikx · Düsseldorf, DE
Paul Callant · Edegem, BE
Marin Steenackers · Mortsel, BE
Sam Verbrugghe · Mortsel, BE

Key dates

Filing date	Sep 29, 2014
Grant date	May 8, 2018
Priority date	—
Expiry date	Sep 29, 2034

Classification

Technology area (CPC G)Physics
CPC primaryG03F7/322
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

A method of making a lithographic printing plate includes the steps of a) image-wise exposing a lithographic printing plate precursor including a hydrophilic support and a coating containing a colorant precursor to form a lithographic image consisting of printing areas and non-printing areas, b) developing the plate precursor to remove the coating in the non-printing areas from the support, and c) drying the plate precursor, and d) subjecting the plate precursor to heat or radiation to induce a colour change of the coating in the printing areas, wherein before step b) the coating in the non-printing areas and the support are characterised by a CIE 1976 colour difference ΔE1 which is 5.0 or less, and after step d) the CIE 1976 colour difference ΔE2 between the coating in the printing areas and the non-printing areas is more than 6.8.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.