half-tone original 半色调原版文件
In the printing process, a continuous tone picture image in the original is converted in a half tone image on the printed material by using screen dots printing technique.
印刷工艺过程中，原件上的连续调画面是通过网点印刷技术转换成印刷制品上的半色调影像的。
Magenta contact screen: A type of contact screen in magenta colour. It is used for making half-tone from black-and- white original only.
洋红接触网片：摄制半色调图片用的洋红色接触网片，它只适合黑白原稿用。
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