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The Method of Solving the Field Printing Ink Color Uneven

Release time:

2024-06-20

First of all, we need to know that the general printing ink color unevenness is manifested as water grain unevenness and orange peel unevenness.

The reason for these two phenomena: water pattern color unevenness is mainly due to the gravure is too deep, and the viscosity of the ink is low. 2. The main reason for the uneven color of orange peel ink is that excessive polar solvents such as butanone are added to the ink. Second, the viscosity of the ink is too high, resulting in poor leveling. The third is the quality of the embossing rubber roller, which leads to uneven pressure on different parts of the printing plate cylinder during printing.

The reason has been found, so what are the solutions?

Contact with plate-making enterprises to find out the matching results of plate cylinder, ink and printing conditions through testing. Plate-making enterprises on this basis to determine the appropriate engraving process parameters. After this process, the gravure plate has strong adaptability in solving the uneven printing of spot color plate in the field.

When receiving new items, communicate with customers in time and try to avoid carving the spot color plate too deep. If the gravure is deep, the working viscosity of the ink can be appropriately increased on the basis of ensuring the leveling of the ink.

For spot color orange peel unevenness, the first one should reduce the ink viscosity, the second one should reduce the pressure of the embossing rubber roller, and the third should improve the printing speed as much as possible.

Reasonable deployment of solvent ratio and ink working viscosity. When the printing speed exceeds 100 m/min, the viscosity of the ink is generally controlled at about 20~26s, and the fast-drying solvent can be appropriately increased in the solvent ratio.