MAGNETIC TAPE CASSETTE

PURPOSE:To prevent the generation of static electricity to make the tape running easy to see, by adopting the sputtering method to color the end face of a magnetic tape. CONSTITUTION:A sputter film 8 is formed in the end part of a magnetic tape 4 by the sputtering method. The magnetic tape to be colored is wound from tape materials into the shape of a pancake and is masked except a coloring unnecessary part, namely, the end part, and this magnetic tape is set in a vacuum vessel,and a target cathode material corresponding to a target color is fixed, and gaseous impurities are removed to perform gas charging in vacuum, and a voltage is impressed between electrodes to perform sputtering, thereby forming said sputter film 8. For developing the target color, it is most effective that the thickness of the sputter film is adjusted to control interference colors.