Simulation Method of Collision of Multi-color Screen Line Overprinting

Abstract

The invention discloses a multicolor cable overprinting moire simulation method. The method comprises the following steps: a, after overlapping and aligning two films which have same round simulation areas and have same ruling number in the two round simulation areas, sheathing the two films on a fixed pointer of a base; and b; rotating one film according to angular coordinates on the round simulation areas, observing the conditions of printing moires and interference fringes in the two round simulation areas, and obtaining corresponding optimum screen dot angles. According to the method, a moire fringe principle and a printing moire principle are utilized; through the dynamic change of ruling angles, platemaking line numbers and screen dot shapes, the complicated and variable printing moire special effect is rapidly simulated; and the effect is ingeniously implanted into the product package printing (flexographic printing) so as to achieve the high-grade anti-counterfeit effect.

Description

technical field [0001] The invention belongs to the printing technology, and in particular relates to a method for simulating multi-color network line overprinting and colliding with the network. Background technique [0002] At present, flexographic multi-color screen line overprint usually needs to select the same number of plate-making lines, a predetermined screen angle (such as 7.5 degrees, 37.5 degrees, 67.5 degrees, 82.5 degrees), the same size and generally circular dots to shield the printing network fringes and interference fringes. [0003] The above-mentioned number of lines is also the number of screen lines, and the unit is L / IN, that is, how many dots per inch. For example, 300L / IN means that there are 300 dots per inch, and 150L / IN means 150 dots per inch. The higher the number of lines, the clearer the printed image. The dot size is the coverage rate (%) of the dot. The larger the dot, the more ink per unit area and the deeper the color. The multi-color s...

AI Technical Summary

Problems solved by technology

However, in the actual printing process, even if the above-mentioned predetermined angle and circular dots are used, defects such as printing screens and interference fringes cannot be completely shielded, and for printing with different plate-making lines and different dot sizes, the selected screen The angles are not the same, so every time you adjust the angle, you need to know the effect after printing, which makes it very difficult and cumbersome to obtain the corresponding optimal screening angle, and also increases the economic cost

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