VOID These include single-faced tapes used as tamper evident closures for money bags, cash and payroll bags, bank and transmittal pouches, parts and storage bags, specimen bags and evidence bags. The tapes void by either tearing easily or by revealing a hidden text that transfers when tampering occurs. To increase its effectiveness, serrated edges and logo printing on the top of the tape are also available. These tapes react to various methods of tampering to include freon, CO2, steam and solvents. Please call for more information regarding this line of tapes.