US Patent 7371443 Multilayer laser transfer film for permanently inscribing parts

A multilayer laser transfer film for permanently inscribing parts made from at least one backing layer, where on at least part of the underside of the backing layer there is a first adhesion layer, characterized in that, on the backing-layer side of the laser transfer film, this being the location of the first adhesion layer, there are at least two pigment layers, preferably a first pigment layer applied to at least part of the material and comprising at least one glass flux pigment, and a second pigment layer applied to at least part of the material and comprising at least one laser-sensitive pigment.