Extensive printing will cause small micro scratches on the print-head surface. These scratchesdecrease the contact area between print-head dotline and material causing a reduced printquality. This product is designed to maintain a smooth surface of the thermal head. This filmhelps to remove scratches and maintain a smooth surface to maintain print quality.Note: Please use with caution – This product should only be used when general cleaning of theprint-head still results in an uneven print quality