Patent ID: 7727702
Filing Date: 2010-06-01
Classification: B41M,C09D,G03C,G03F,Y10S

Abstract:
1. A method of irreversibly coloring a coating composition containing a color former comprising the steps of a) providing a coating composition that contains a thermosetting resin with the proviso that the coating composition contains no developer nor any additive which may function as developer; b) mixing the coating composition with the color former whereby no color is formed; c) applying the colorless composition obtained in step b) to a substrate; d) in case of a thermosetting resin other than an alkyd resin curing the resin between 100 and 300° C. whereby no color is formed, and in case of alkyd resin drying of the resin at room temperature, whereby no color is formed; e) exposure to UV or high energy radiation below 400nm whereby the color is formed.