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Printing: Du Jue Color Deviation And Moire

        We all know that the screen angle should be determined according to the primary and secondary of the original color (tone) in the process of color plate making. Printing: Du Jue Color Deviation And Moire

       Because the 45 ° angle has a special sensitivity to people’s line of sight, the main tone printing plate of the original is made into 45 ° angle, and the other color angles are set as 15 °, 75 ° and 90 ° in turn. Printing: Du Jue Color Deviation And Moire

      In the process of printing restoration, the dots intersect at different angles to form various patterns, among which the cross pattern has the best color effect,.Printing: Du Jue Color Deviation And Moire

      followed by the monk hat pattern. In four-color plate making, only strong colors black, blue and red can form patterns, Printing: Du Jue Color Deviation And Moire

       while yellow is a weak color, which does not play the role of pattern formation, but only the role of color change. Printing: Du Jue Color Deviation And Moire

      Therefore, when determining the four-color screen wire angle in plate making, the screen wire angle difference of black, blue and red should be made into an interval of 30 °. Printing: Du Jue Color Deviation And Moire

     The result is not only conducive to the color rendering effect, but also can prevent the moire fault caused by the 15 ° difference of each color screen wire.Printing: Du Jue Color Deviation And Moire

      Three dimensional bronzing can adopt flat, round and round bronzing die-cutting machines. Bronzing uses etched copper plate or engraved brass plate. Corrosion red copper plate is used for plane bronzing, with short service life, generally 100000 times; Printing: Du Jue Color Deviation And Moire

      The service life of engraved brass plate can reach 1 million times, which is suitable for long plate live and good bronzing quality. Printing: Du Jue Color Deviation And Moire

     The concave convex bottom mold is prefabricated with gypsum or glass fiber materials, which has low cost but complex processing; Glass fiber material is easy to install and locate.Printing: Du Jue Color Deviation And Moire

Printing: Du Jue Color Deviation And Moire

      Even if we choose the above-mentioned screen line angles in plate making, if the color sequence arrangement is not appropriate,Printing: Du Jue Color Deviation And Moire

      The screen line angles of the printing plates of the two adjacent color groups may still differ by 15 °, Printing: Du Jue Color Deviation And Moire

      and there is still the possibility of color deviation, moire and other defects, which will not achieve a better effect of printing and restoring the original.Printing: Du Jue Color Deviation And Moire

 

       For example, the original of landscape painting tends to focus on blue. According to the principle of taking the main color printing plate of the original as 45 °, here we set the screen angle of blue as 45 °, followed by 75 ° for the red version, 15 ° for the black version and 90 ° for the yellow version.Printing: Du Jue Color Deviation And Moire

       In the four-color offset press, the printing color sequence is arranged in the order of black first, then blue, red and yellow, the difference between the adjacent red and yellow plates is 15 °,Printing: Du Jue Color Deviation And Moire

      especially in the low-key area with dot above 75 °, as long as the paper is slightly misplaced in the process of transmission and embossing, it is easy to cause defects such as wrong screen, color deviation and moire spots.Printing Du Jue Color Deviation And Moire.Printing: Du Jue Color Deviation And Moire

 

      According to the theory of determining the screen wire angle according to the primary and secondary color (tone) of the original, as well as the problems often occurred in daily production operations, Printing: Du Jue Color Deviation And Moire

      in order to better solve the problems of color deviation and moire on the multi-color offset press, the solutions are as follows:Printing Du Jue Color Deviation And Moire.Printing: Du Jue Color Deviation And Moire

 

      First of all, we should check from the source of process design. After the process technicians in the enterprise and production workshop accept the original, the first problem is to determine the 45 ° screen color plate according to the main tone of the originalPrinting: Du Jue Color Deviation And Moire

      Then determine the screen angle of other color plates and the printing color sequence of four-color offset press. Printing: Du Jue Color Deviation And Moire

      For example, for landscape painting originals whose main colors are blue and green, the blue screen line is set at 45 °, the black screen line is set at 15 °, Printing: Du Jue Color Deviation And Moire

      the red screen line is set at 75 °, the yellow screen line is set at 90 °,Printing: Du Jue Color Deviation And Moire.and the color sequence is black first, followed by red, blue and yellow. Printing: Du Jue Color Deviation And Moire

       We believe that in the printing process, the screen line angles of adjacent two color groups differ by at least 30 °.Printing: Du Jue Color Deviation And Moire

        According to the above order of screen lines, the difference between black and red is 60 °, the difference between red and blue is 30 °, and the difference between blue and yellow is 45 °. Printing: Du Jue Color Deviation And Moire.This printing order can effectively prevent the occurrence of color deviation and moire defects.Printing: Du Jue Color Deviation And Moire

 

       Similarly, for the original with red as the main tone, after setting the wind line of the red plate at 45 °, the process designer shall arrange the red plate for printing in the third color group;Printing Du Jue Color Deviation And Moire

      The black screen line shall be 15 ° and printed in the first color group; In turn, the blue screen line is 75 ° and printed in the second color group; The yellow screen cable is 90 °, which is more suitable for printing in the fourth color group.Printing: Du Jue Color Deviation And Moire

 

      It can be seen that the complementary relationship between the above network cable angles and their color sequence arrangement should be paid attention to by the process technicians of the enterprise,Printing: Du Jue Color Deviation And Moire

     And better grasp this law through the organic combination of theory and practice, so as to prevent the occurrence of unnecessary color deviation and moire defects.Printing: Du Jue Color Deviation And Moire.Printing: Du Jue Color Deviation And MoirePrinting: Du Jue Color Deviation And Moire

       For example, Rodin portrayed Balzac as a statue, but also showed Rodin himself.Printing: Du Jue Color Deviation And Moire

       Mr. Zhang Shouyi once said.Printing: Du Jue Color Deviation And Moire

      The binding artist is “acting on the same stage with the writer”, and has put the design in the position of the second cultural subject.Printing: Du Jue Color Deviation And Moire.

       Cold bronzing technology is a new bronzing process. It does not need to use the heated metal printing plate, but directly apply the adhesive to the pictures and texts to be decorated. Printing: Du Jue Color Deviation And Moire

     During printing transfer, the electrochemical aluminum contacts with the adhesive to make the electrochemical aluminum adhere to the surface of the printed matter.Printing: Du Jue Color Deviation And Moire

       Cold stamping usually adopts the form of round pressing, and the stamping speed is fast, but the surface effect and firmness of stamping are poor. Printing: Du Jue Color Deviation And Moire

     Therefore, printed matter also needs polishing or film coating processing.Printing: Du Jue Color Deviation And Moire

      Cold stamping process is a promising technology with low cost, energy saving and high production efficiency.Printing: Du Jue Color Deviation And Moire