US Patent 7816302 Printable identification medium for use with thermal printers

An identification device in the form of a wristband, labels, tags or cards, including a clear thermal sensitive coating laminated between a clear plastic coating and a liner ply having colored regions or printed matter. The colored regions or printed matter is visible through the clear thermal sensitive coating and clear plastic coating until the thermal sensitive coating is activated and becomes selectively opaque. The clear plastic coating having a uniform thickness allows for reliable thermal printing on the thermal sensitive coating with the clear plastic coating in place.