PLATE OF THERMOPLASTIC MATERIAL WITH IMPROVED OPTICAL PROPERTIES, PROCESS FOR THE MANUFACTURE OF SUCH A PLATE AND USE THEREOF

摘要

The present invention relates to a plate made of a thermoplastic material including two planar outer sheets and one thermoformed central sheet having bosses on at least one surface, which is bonded to both planar sheets, the plate incorporating a dyeing agent in a sufficient quantity so as to render the plate opaque. The plate is characterized in that the dyeing agent is incorporated into 80 to 100% of both planar outer sheets, wherein both outer sheets are opaque, and at most, incorporated into 20% of the thermoformed central sheet, wherein the center sheet is translucent. The plate of the invention can be used as a printing substrate.