Issues to note when using screen printing ink dispersants

Issues to note when using screen printing ink dispersants

When using screen printing ink dispersants, you need to pay attention to the following key issues:

1. Selection of dispersants

Matching: When selecting a dispersant, it is necessary to ensure that it matches the system of the screen printing ink to avoid problems such as ink stratification, precipitation or gelation caused by incompatibility.

Effect evaluation: Experimentally evaluate the effects of different dispersants on the dispersion effect of inks and select the best type and amount of dispersants.

2. Dispersion process control

Dilution and mixing: When diluting the dispersant, ensure that the dilution ratio is appropriate and gradually add the dispersant under stirring conditions to avoid excessive local concentration. During the mixing process, maintain appropriate temperature and stirring speed to promote uniform dispersion of the ink.

Grinding and dispersion: Use appropriate grinding equipment to grind and disperse the mixed ink to ensure that the pigment or filler is evenly distributed in the ink. The fineness and dispersion of the ink should be checked regularly during the grinding process and adjusted as needed.

3. Ink performance monitoring

Viscosity adjustment: Adjust the viscosity of the ink according to the printing requirements to ensure that the viscosity is moderate, neither too high nor too low, to ensure printing quality.

Filtration and testing: Before printing, filter the ink to remove impurities and particles. At the same time, use testing instruments to detect the fineness, viscosity, color and other performance indicators of the ink to ensure that it meets the printing requirements.

4. Safety and environmental protection

Personal protection: When using dispersants, wear appropriate protective equipment such as gloves, masks and goggles to prevent harm to the human body.

Environmental protection: Choose environmentally friendly dispersants and properly dispose of discarded inks and dispersants to reduce the impact on the environment.

5. Storage and preservation

Storage conditions: Dispersants should be stored in a cool, dry, well-ventilated place, avoiding direct sunlight and high temperature environments.

Shelf life management: Pay attention to the shelf life of dispersants and avoid using expired or deteriorated dispersants.

6. Precautions

Avoid excessive use: Excessive use of dispersants may cause ink performance to deteriorate, such as reduced viscosity, lighter color, etc. Therefore, the amount of dispersants should be strictly controlled.

Stir evenly: After adding the dispersant, ensure that the ink is stirred evenly to avoid local concentrations that are too high or too low.

Experimental verification: Before formal use, it is recommended to conduct a small-scale experimental verification to ensure the effectiveness and safety of the dispersant.

In summary

When using screen printing ink dispersants, it is necessary to pay attention to the selection of dispersants, dispersion process control, ink performance monitoring, safety and environmental protection, storage and custody, and precautions. By strictly controlling these factors, the uniform dispersion of the ink and the stable improvement of printing quality can be ensured.