Ask a question about screen printing ink, how to reduce the surface porosity after drying?

According to your situation, I suggest you consider the following aspects:

Adjust the ink formula: consider adjusting the ratio of barium sulfate to gas silicon, or try to use other types of fillers, such as microcrystalline spheres and nano-barium silicate. In addition, we can try to add other leveling agent and defoamer to adjust the viscosity and surface tension.

Optimize printing process: increasing printing pressure and reducing printing speed can make ink flow evenly and reduce the appearance of pores and pits.

Adjust the drying process: the drying temperature and time after printing have great influence on the drying quality of ink. You can adjust the drying temperature and time appropriately, and keep ventilation during the drying process to control the volatilization and flow of gas on the ink surface.

Try silicone system: silicone system has good wettability and fluidity, which can reduce surface tension and reduce the formation of pores and pits. Therefore, trying to replace silicone ink may improve the performance and quality of ink.

It should be noted that the adjustment of ink formula and printing process needs to be combined with actual test and verification, and optimized according to different situations and requirements. At the same time, we should also pay attention to safety and environmental protection in the testing process, and avoid using chemicals harmful to human body and environment.