What is the reason for burrs on the edge of screen printing ink and how to solve it?

Insufficient or uneven screen tension: Insufficient or uneven screen tension may cause the ink to fail to pass through the screen mesh evenly during printing, resulting in burrs on the edges of the printed graphics.

The solution is to adjust the screen tension to make sure it is tight enough and even.Poor squeegee quality: Using a severely worn or inappropriate squeegee may cause the ink to fail to scrape evenly during the printing process, resulting in burrs.The solution is to replace the scraper and make sure it is of good quality and has a sharp edge.Ink viscosity is too high: Ink viscosity is too high may cause it to stay on the screen for too long, making it difficult to scrape the ink flat at the edges, resulting in burrs.

The solution is to adjust the viscosity of the ink to suit the printing conditions.Unreasonable mesh design of the screen: The mesh design of the screen may not be ideal, and the mesh structure at the edges may not be strong enough or dense enough, resulting in ink being unable to be transferred evenly at the printing edges.The solution is to optimize the mesh design of the wire mesh to ensure it provides adequate support at the edges.

Uneven substrate surface: Unevenness or contamination on the substrate surface may affect the transfer of ink during the printing process, leading to the generation of burrs.The solution is to ensure that the surface of the substrate is clean and smooth, and surface treatment measures may be required, such as decontamination, grinding, etc.In summary, to solve the problem of burrs on the edges of screen printing ink, factors such as screen tension, scraper quality, ink viscosity, screen design, and substrate surface conditions need to be comprehensively considered, and corresponding adjustments and improvement measures must be taken.In practice, some experimentation and adjustments may be required to find the best solution.