Patent ID: 6905812
Filing Date: 2005-06-14
Classification: B41C,Y10S

Abstract:
1. A method of producing a printing form from a printing form precursor, the method comprising: (a) providing a positive working printing form precursor having a thermally imageable coating on a substrate, wherein the precursor is prepared by: (b) following a period of at least 6 days after the precursor is prepared, exposing selected areas of the coating to heat, thereby rendering the exposed areas preferentially soluble in a developer solution, with the proviso that the precursor is not subjected to heat treatment after being prepared and prior to exposing; and (c) developing the precursor in the developer solution to remove the exposed areas, wherein the developer solubility of the unexposed areas at the time of exposing is not significantly changed, as compared to the developer solubility of unexposed areas for an identically prepared precursor exposed after a period of only one day following preparation.