In the printing production of the soft pack factory, once the temperature is low and the machine speed is slow, the ink in the ink fountain often has a problem of unsmooth transportation and abnormal ink supply, which causes the ink color of the printed product to become lighter. This is the main manifestation of the poor thixotropy of ink, which seriously interferes with the stability of printing ink color quality.
In this editor's note, the soft package factory should pay attention to control the following key points:
1. Pay attention to often stirring the ink in the ink fountain to keep it continuous and uniformly fluid, so as to ensure the stability of the product's ink color quality;
2. When purchasing inks, you should pay attention to selecting high-grade inks. Because the thixotropy of high-end inks is relatively stable, it is beneficial to improve the quality of printed inks;
3. The production workshop for printing color products should adopt the constant temperature and humidity process conditions as much as possible;
4. The speed of the printing machine should not be too fast, and adopt a constant speed to expand printing;
5. Try to remove the unusable rubber rollers;
6. The contact pressure between the rubber roller and the inking roller cannot be adjusted too tight;
7. Don't adopt hard rubber rollers;
8. The contact between the rubber roller, water roller and the printing plate should be appropriate to minimize the friction coefficient in the printing sequence, minimize the interference of the friction heat on the ink characteristics, and reduce the interference of the ink's thixotropy on the printing ink color. .
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