Patent ID: 7287704

Claim:
A multi layered document comprising: a core layer of a first material having a top surface and a bottom surface, said core layer having information printed on at least one of its top and bottom surfaces with a printing ink; first and second buffer layers of clear amorphous polyester material; each buffer layer having first and second surfaces and a predetermined thickness; the first surface of the first buffer layer being integrally bonded to the top surface of the core layer and the first surface of the second buffer layer being integrally bonded to the bottom surface of the core layer; additional layers of clear material integrally bonded to the second surfaces of the first and second buffer layers; at least one of these additional layers including a layer of laser reactive material for enabling information to be engraved on the laser reactive material using a laser, and during the course of which heat is generated within the laser reactive layer; and the buffer layers formed of non-laser reactive materials and being of sufficient thickness to protect the printing ink on the core layer from being adversely affected by the heat of the laser engraving in any of the other layers.