Printing ink printing common failure analysis - dirty version

The ink printing plate is almost the same as the dirty plate printing ink. The reason is:
Version 1 of the drum chrome-plated rough is the most common cause of failure;
2 On the non-printing surface, there is a layer of thin ink (sometimes also have different regular bars); the ink has strong wettability on the surface of the chromium, causing the scraper to scrape off;
3 scraper late pure or angle is not correct;
4 Ink drying is too slow or the silk head is too long.

Approach:
1 If the chrome surface of the new roll is rough, a quick-drying solvent can be used in the ink to dry the thin ink layer formed between the doctor blade and the embossing roll. After a few hours, the chromium surface is ground and then the normal solvent is changed. ;
2 Change with a new blade and adjust its angle;
3 Add solvent, especially to speed up the dry solvent to reduce the viscosity of the ink - such as the withdrawal agent or gold oil; 4 is to add calcium to the paste to reduce its silk and increase the printing ink ink layer thickness and fluidity.

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