Printing ink printing common failure analysis - gloss difference

Second, graphic brightness is insufficient (ie, poor gloss)

The whitening phenomenon listed above will be dull. Sometimes it does not reach whitening, but also affects the gloss of the ink film after printing.

Ink thick and no light

Cause: The ink is excessively dispersed during grinding or mixing of paper or plastic crumbs and environmental dust during storage or printing. Second, the diameter of the binder or pigment particles in the ink system is larger than 0.1 μm, resulting in insufficient brightness of the printed graphic, followed by the ink system. Low gloss or poor gloss due to excessive resin content or additional dilution solvents (but not true solvents) during printing.

Processing method: When the ink reaches a certain degree of fineness, it will not be ground again. It should be stored in a warehouse or workshop at a room temperature of 15 to 30°C. The second is to improve the printing shop environment to ensure clean, bright and dust-free, fixed-point removal of paper or plastic shavings at regular intervals; The third is to re-grind or filter the ink or change the new ink; the fourth is to add gold transfer ink, true solvent or plasticizer in the ink fountain to reduce the viscosity of the ink.

Failure (1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11)