LASER-SENSITIVE RECORDING MATERIALS HAVING AN UNDERCOATING LAYER

摘要

The present invention provides a laser-sensitive recording material, which comprises a substrate being coated with a recording layer and an undercoating layer, wherein the recording layer undergoes a colour change upon heat treatment produced by laser irradiation and wherein the undercoating layer comprises a pigment with the proviso that the system of the recording layer that undergoes a colour change upon heat treatment produced by laser irradiation does not comprise an organic leuco dye and an organic colour developer, a process for its preparation, a process for marking the laser-sensitive recording material and the marked laser-sensitive recording material.