Several Ways to Improve the Printing Force of Printing Plates

1. Baking version. PS version after exposure, development, removal of dirty, after a certain time at 230 ~ 250 °C baking, so that the original photosensitive layer molecular structure changes, the formation of three-dimensional network structure, a solid graphic basis.
2. Positive PS version should be kept from light.
3. The pH of the fountain solution should be appropriate.
4. Choose a substrate with a smooth surface and no impurities.
5. Carefully adjust the contact pressure between the water roller and the ink roller and the surface of the printing plate. The adjustment should be performed on the non-graphic part of the printing plate.
6. When the water roller and the ink roller are in contact with the printing plate, the axial turbulence should be as small as possible, and when it is not in contact with the printing plate, its circumferential rotation is flexible and free.
7. Select the hardness of the water roller and the ink roller to be appropriate, and the roundness is higher.
8. According to the instruction manual of the machine, adjust the pressure between the blanket cylinder and plate cylinder reasonably to reduce the friction on the printing plate.
9. Reasonable use of driers to prevent the ink from drying prematurely during transfer, maintain its rheology, and meet the needs of the remaining ink layer of the printing plate graphic to protect the printing plate.
10. Care must be taken in the process to prevent abnormal damage to the plate, especially when picking and placing.
11. Before the machine is inspected, check carefully whether the plate has scratches, dirt, oil stains, whether the coating is uniform, and whether there are foreign matter on the back of the plate and the gasket.
12. After a long period of shutting down or removing dirt, apply a uniform and thick layer of suitable hydrophilic protective glue (such as gum arabic).


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Source: Ke Yin Media - "Printing Technology - Publishing Commercial Printing"