| 摘要 |
PURPOSE:To prevent dots from being clogged and to enable good printing by fully deepening any valleys between peaks arranged at extremely close intervals, such as dots. CONSTITUTION:A fixing plate 3 is rotated and a casing 6 is reciprocated by driving a motor 12 and a cylinder 14, and UV rays (a) fall on a film 21 from a lamp 8 through a slit 16 in almost parallel. The rays (a) intrudes past the transparent parts of the negative film 21 into a resin plate 2 in an angle almost perpendicular to it. Therefore, the hatched parts of the plate 2 are exposed to the rays (a) to harden and the white parts A covered with the opaque parts of the film 21 is left without hardening, and a relief plate deep in the valleys shaped as shown with said hatched parts are obtained by washing the plate 2 with water, alcohol, or the like. |
