| 摘要 |
PURPOSE:To remove foreign matter accumulated on a thermal head through a simple operation and without damaging the thermal head, by a method wherein a sheet comprising a lubricant layer having a specified melting point or a lubricant-containing layer on a plastic film is fed while heating the head before conducting thermal recording by using an ink ribbon. CONSTITUTION:A plastic film used as a base may be a film of polyethylene terephthalate, polypropylene, an acrylic resin or the like, the thickness of which is ordinarily about 6-25mum. A lubricant provided on the base is at least one wax, surfactant or the like. A paraffin wax, an oxidized was, an ester wax or the like may be used as the wax, while a nonionic surfactant, an anionic surfactant, a cationic surfactant or the like may be used as a surfactant. The lubricant has a melting point of 50-100 deg.C, and is used in an amount of 0.002-0.5g/m<2>, regardless of the presence or absence of a solvent-supporting layer. |
