Factors affecting the printing quality of middle and high-grade wrinkle ink (2)

(1) Screen mesh number

The higher the precision required for the print, the higher the number of screen meshes, and vice versa. In the selection of screen mesh number, manufacturers recommend the use of screens of 100, 150, and 200 mesh. If the precision of printing equipment is high, screens with a higher mesh number can be selected. At the same time, taking into account the limited experimental conditions, the mesh size selected for this experiment was 150 mesh.

(2) Tensile web angle experiments showed that the stretch angle was 0°, the print did not produce moire; when the stretch angle was 30°, the moire was lighter; when the stretch angle reached 45°, the moire was most severe; When the angle is 60° or 75°, the print produces a lighter moiré pattern.

In a further experiment, it was confirmed that no moiré was produced when the stretch angle was 10°, 20°, and 25°.

Therefore, in the following fine experiment, the range of the stretch angle is set between 0 and 30°.

(3) Network distance

When the net distance is within 5mm, the image can be fully displayed on the substrate; and when the screen distance exceeds 5mm, the image displayed on the substrate is less and less as the distance increases.

And because the minimum value of the pitch adjustment in this experiment is about 1.5mm. Therefore, in the following fine test, the setting range of the mesh distance is 2 to 5 mm.

(4) Printing speed

The change in printing speed does not bring about a change in quality. It can only change the size of the ink wrinkle pattern. The printing speed is fast, the pattern is small; the printing speed is slow, and the pattern is large.

Because the size of the pattern is not included in the scope of the quality evaluation, the factor of the printing speed is not considered in the precision test.

(5) The change of the angle of the blade angle of the blade can not change the quality of the printed material, only the size of the pattern. Scraper angle is small, pattern is small, on the contrary, the pattern is large.

Also because the pattern size is not included in the scope of the quality assessment, the blade angle is not considered in the precision test.

(6) Ink wrinkle, drying speed Crease speed is too slow, and the print cannot wrinkle. Experimental measurements When the wrinkle speed is less than 14m/min, the ink cannot wrinkle. When the speed reaches 14m/min and 14m/min or more, the ink will wrinkle.

Therefore, the range set in the precision test is 14 to 20 m/min.