What is: Screen ?

This is the ruling that is used to determine how many dots a unit area should have during the process of developing the tonal values on the printed piece. The screens are of different ranges. The different ranges of screens are from 60 (sixty) lines-per-inch for newsprint printing to 150(one hundred and fifty) lines for coated paper printing. Generally, Offset halftones for printing on surfaces ranges from about 133 (one hundred and thirty-three) lines to 200 (two hundred) lines.

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