Halftones

例句:

• Briefly stated, the process of making halftones is as follows: The subject to be engraved is photographed through a halftone screen, so-called. 佚名. 神奇的知识之书.
• The differences in cost in the production of halftones is due largely to the length of time devoted to this work. 佚名. 神奇的知识之书.
• These plates made up of both line work and halftones are known as combination plates or double-prints, depending upon the way they are produced. 佚名. 神奇的知识之书.
• The successful use of halftones, whether in black and white or in colors, depends on the care with which the particular screen is selected to suit the paper stock and printing conditions. 佚名. 神奇的知识之书.
• Photo-engravings, broadly speaking, are divided into two classes--line engravings and halftones. 佚名. 神奇的知识之书.

校对:贾斯廷