| 摘要 |
PURPOSE:To express a fine pattern on the protecting layer of a disk board by forming a multicolor printing part by curing an acrylic ultraviolet-curing type ink. CONSTITUTION:The acrylic ultraviolet-curing type ink is transferred onto a protecting layer 6 of the disk board by an offset printing through the use of a waterless planographic plate (machine plate) and, thereafter, cured by the irradiation of an ultraviolet, radiation. The above-mentioned operation is repeated by changing the color of the ink to be different, and the multicolor printing is executed. Since a multicolor printing part 2 formed by the curing of the acrylic ultraviolet-curing type ink obtained in such a way is made of the acrylic ultraviolet-curing type ink, the film thickness of a thin film due to the curing of the ink in each color is thin, and the fine pattern can be obtained. |
