Water-based screen printing inks in the screen printing What are the precautions?

1, in the screen printing, pay attention to control the parameters of water-based screen printing ink, including the viscosity of the ink, liquidity, thixotropy and plasticity.

2, pay attention to water-based screen printing ink control indicators. Water-based ink control indicators are fineness, viscosity, pH and drying speed, etc., which play a decisive role in the application of ink.

3, due to water-based screen printing ink for the water-based system, so be careful not to use water-based ink and alcoholic ink and solvent-based ink mixed with or in the ink by adding organic solvents, so as to avoid printing quality problems.

4, the use of water-based screen printing ink, it should be stirred evenly, after measuring the viscosity into the ink tank appropriate, if the viscosity is not suitable, can be adjusted with a thinner or thickener, and pay attention to control the ink pH, the general control In 8.5 ~ 9.5. Printing process, due to the volatilization of water, water-based screen printing ink viscosity will increase, the pH value drops, so we often observe the use of ink and found that ink viscosity or pH exceeds the control range, the timely use of diluent and pH stabilizer to adjust, to ensure the viscosity and pH stability.

5, Under normal circumstances, water-based screen printing ink is very suitable for high-speed printing, low-speed printing if you encounter too fast or ineffective printing ineffective, you can add a certain percentage of slow-drying agent.

6, After the printing is completed, the remaining water-based screen printing ink should be returned to the corresponding original barrel or the ink tank lid should be covered tightly for future use. To prevent the surface of the ink as the conjunctiva, thickened or even dry. Water-based ink should be stored in ventilated and cool indoor, room temperature control at 5 ~ 45 ℃.

7, After printing, the ink remaining on the printing equipment can be rinsed with water when it is not completely dry, and the ink that can not be washed with water can be cleaned with detergent.

8, water-based screen printing ink printing printability by printing conditions, substrate surface properties, temperature and humidity environment, the length of the storage of such objective conditions, so when in use, you need to use some additives on the water-based screen printing ink do Fine-tune for the best printing results.

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