Methodology of the Correct Plate-Making to Keep Consistence of Tone Reproduction

The process of offset plate copy is controlled through the correct reproduction at the highest and the lowest tone. We propose that we should control the whole tone, and we need the correct control method. Based on the offset control strap, this paper proposes a new detected method of plate resolution and analytic method of the correct copy range of plate. Using these methods and through the experiment, we analyze the resolution and the correct copy range of three types of offset plates. By working in the correct copy range, we can guarantee the consistence of tone reproduction of different types of plates. This is the precondition for color consistence in color printing and convenient to adjust the press.