In the screen printing machine printing work will inevitably appear a variety of problems, such as screen printing substrate bubble is also a very common phenomenon. Comprehensive screen printing to share with you how to deal with screen printing after the issue of printing substrate bubbles.
PCB screen printing machine
In screen printing, if there are bubbles in the substrate, it will greatly affect the aesthetic of the substrate, then how are these bubbles generated? How can we avoid them?
First, Full Screen Screen Printing explains how the screen printing works on these bubble substrates.
1. screen printing ink is too thick, when the substrate and screen separation will have screen agent, beyond the range of ink viscosity, ink back to the substrate surface, but the ink will fall back at the same time, part of the lid, resulting in bubbles.
Solution: The best solution is to dilute the ink with ink.
2. Dust and sundries on the surface of the substrate. If there is dust on the substrate surface during screen printing, the bubbles created after printing are actually dust particles.
Solution: The only way to solve this problem is to finish the surface cleaning of the substrate before printing.
3. Ink scraper shape?? Shape is not suitable. It can also cause air bubbles if the blade is flat or not curved.
Solution: Replace the appropriate screen printing scraper.
4. Printing speed is too fast or printing speed is uneven.
Solution: Uniform printing.
In addition, we can add defoaming agent in the ink, play an early preventive role.
I believe the above methods can help screen printing companies to print on the screen printing machine.