Zinco a line or coarse screen half-tone block etched on zinc for letterpress printing. see zinc engraving.
线条锌版活版印刷用的线条或粗网半色调凸版。参阅锌电版。
2
In the printing process, a continuous tone picture image in the original is converted in a halftone 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。
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This product is mainly used for control of half-tone screen printing, especcially suitable for making adjustment, high-precision screen double sided circuit.