A Study Of FM Screening Technics Based On CTP Technology

After more than 20 years ' development, Frequency-Modulated (FM) screens has already reached commercialization. Many printing seal supperlier offer Frequency-Modulated (FM) screens to their customers, but because of all sorts of techniques reason, the use of Frequency-Modulated (FM) screens are few in actual production. In recent years, CTP equipment is accepted by many printing company, this add for Frequency-Modulated (FM) screens the new opportunity. So we have the necessary to research the Frequency-Modulated (FM) screening in the new digitized printing process. And hope that the research can help to develop the using of Frequency-Modulated (FM) screening.This text has carried on most of all exploration to the techniques of Frequency-Modulated (FM) screening on the basis of experiment. First of all, test the output characteristic of Frequency-Modulated (FM) screens on CTP, summarize the quality control method of CTP plates, and corresponding linearization adjustment was made. Then, by using the plates come from the output or CTP, mechanical proofing is used to study the dot gain regularity of FM screening and AM screening, research the method to find the best solid density of proofing, compare the difference data in gray balance of AM and FM screening, and analyzed the color gamut of FM screening. By the environment of printing imitated from mechanical proofing we analyzed all most the techniques in the use of FM screening, and then come to the whole craftwork in the digital process of printing.Some quality control method and some craft characteristics summarized that this text puts forward can be applied to practice as consultation.