How to control the concentration of flexographic printing ink

Concentration and viscosity are two concepts. I don't know what you are asking.

Concentration: generally refers to the color concentration, the color is darker;

Viscosity: refers to the thin consistency, which is too thin to print and dries too fast; It's too thick to dry.

To control the printing quality stability of ink:

1, adjust the required color concentration and viscosity according to the dilution ratio of 30% and white 50%, or according to the requirements of the pattern, measure the diluted viscosity with a Charn cup and make records;

2. During the printing process, measure the viscosity every half hour and add 3% thinner each time;

3. When there is enough ink, use an air pump to circulate the ink for printing; 、

4. If the conditions are good enough, control the indoor constant temperature and humidity, the temperature is 25℃ and the humidity is 65 5%.