Abstract: A thermal indicator using indicia formed by opaque ink applied to a thermal imaging material element is described. The ink is substantially the same color as the imaging element background and remains substantially hidden until the imaging element background changes color when heated. Time-temperature exposure indicating labels can be prepared using a printer with direct thermal type and ink jet type print heads.

Abstract: A tunable radio frequency identification device and a method for customizing a radio frequency identification device are disclosed. The method for customizing the radio frequency identification device includes: providing a radio frequency identification device having a tunable antenna; and modifying the tunable antenna. As a result of modifying the antenna the inlay is tuned to operate within one of several frequencies bands.

Abstract: A label of the type bearing an RFID device, and removably attached to a backing liner. A cavity is formed in the label, the liner, or both. The RFID device is positioned in the cavity. If the RFID device were not placed into the cavity, but merely laminated between the label and the liner, then the RFID device would create a bulge. Processing steps which apply pressure would then apply large pressure at the bulge, perhaps damaging the RFID device.

Abstract: A thermal paper with a fluorescent security mark printed on the thermosensitive coating that is responsive to wavelengths in the range of 200 nanometers to 400 nanometers. The mark is either printed on the thermosensitive coating directly or on an optional protective top coat positioned over the thermosensitive coating. Methods of preparing the thermal paper comprise printing a solution, dispersion or emulsion of a fluorescent compound on the thermal paper by flexographic printing.