Printing ink is one of the important raw materials, but also the main factors affecting the quality of printing products. The correct use of ink, in fact, is to control the quality of ink. Fineness of a good water-based ink, pigment, filler particles on the relatively thin, good color effect, printing ink when the relative amount of less, you can get a more satisfactory color effect.

Flexo water-based ink fineness control, fineness dispersion meter can be used to detect, general flexo printing ink fineness of less than 20 m is appropriate, lower values of ink color concentration, the stronger, can be relatively reduced, will be able to obtain the ideal color ink, printing also nots allow to prone to paste version, and other ills.

One of the main indicators of the viscosity is water-based ink, the influence on the quality of printing products larger, if the viscosity is too high, the leveling of ink is not good, affect the ink uniform coating and prone to dirty version, paste version and other ills. On the contrary, if the viscosity is too low, the quality of printing color effect is not good. Usually water-based ink viscosity grade should be controlled in 20 seconds, the strong color, bright color.

Adjust the ink viscosity, by controlling the temperature of the ink and the amount of diluent, the viscosity of the ink to meet the printing requirements. Viscosity of water-based ink, commonly used viscosity paint cup 4 filled with ink, then flows through the hole to ink cup time is the test results from the release. In addition to fineness and viscosity, water-based ink is pH value can not be ignored important control index, and the pH will change the viscosity of the ink. Usually the water ink pH control in the range of 8.5-9.5, when the printing ink performance is relatively good, the printing quality is relatively stable. When the pH value is higher than 9.5, due to the strong alkaline ink, its viscosity will decrease, the drying speed is slow, poor water resistance. And when the pH value is lower than the 8.5, due to the weak alkaline of ink, the viscosity is high, ink is easy to appear the phenomenon of dry, plates or reseaus and jam, and caused Suites dirt. Therefore, the printing process should pay attention to the pH control. Generally used to adjust the ink pH pH stabilizer, use appropriate pH stabilizer will stir ink or directly into the circulation pump in ink.