| 摘要 |
PURPOSE:To clearly dye only a plastic part onto which an ink is adhered, by a method wherein a sublimable dye ink generating head when being irradiated with an ultrasonic wave is applied onto a surface of a plastic, and is irradiated with an ultrasonic wave. CONSTITUTION:The sublimable dye ink 2 generating heat when being irradiated with an ultrasonic wave is applied onto the surface of the plastic 1, and is irradiated with an ultrasonic wave. Only the ink 2 generates heat, which is given to the plastic part 3 making contact with the ink, thereby providing a part 4 dyed in the sublimable dye. Then, irradiation with the ultrasonic wave is stopped, heat is released, and the ink remaining on the surface of the plastic 1 is removed, whereby only the plastic part 4 on which the ink has been adhered is dyed. Accordingly, lines, characters or the like can be clearly printed. |
