¡¡¡¡Case 1: frequently encountered in the actual production of 30% ~ 50% magenta and 100% green version dieyin blue field, because often appear bad paper rednet (hair flower phenomenon, and use good paper problem is solved, very clearly paper is the main cause of the failure. But can you solve this problem by adjusting the process? By analysis, the normal color sequence of printing is black, green, magenta and yellow.
¡¡¡¡The magenta screen should be superimposed on the newly printed blue field. In order to prevent the anti-stripping, it reduces the viscosity of the red ink and increases the viscosity of the green ink. The problem remains unresolved. Although it is better to use imported ink, it is not ideal. After analysis, because of the wet dieyin four-color machine, another color on the wet ground dieyin, transfer printing effect is poorer, ink transfer rate is low, try to magenta and blue change color series, printed rednet (first, 100% such magenta network can transfer to the paper, heat transfer rate is highest, and green version of the field more than half of the area can be directly transfer printing on paper, so that the printed print was very flat, the solution of the problem is the fundamental, even if the switch to a lesser paper quality can also be printed solid.
¡¡¡¡Example 2: at one time, using 150g/m2 offset printing paper cover, its layout has a large area of green field. Looking for use when the rules is coated paper, the field is very flat, and switch to 150 g/m2 offset paper field are seriously hair flower and increase printing pressure is invalid, apparently offset paper rough paper, ink sex differences.
¡¡¡¡Because cyan is in the second group, the paper is ink-friendly sex is poor, with the ink union is not tight, the green ink on the printing will be in the latter two groups of rubber cloth to be stripped down part. So would a single seal not be printed? We will machine the rest of the group from the pressure of color, only print the cyan, print out the results of the field is very flat, so we adjust the printing color sequence, and put the green version on the final group, printing hair flower troubleshooting.