1. Effect of film thickness on clarity
For the stencil made of photosensitive film, the thickness of the film layer on the printing surface is about 3 ~ 5μ, the thickness of the film layer covering the screen mesh is uniform, and the printed image has no jagged effect.
2. Effect of template thickness on ink adhesion
When printing a line about 2mm wide, the pressure of the squeegee makes the screen contact with the printing material, and the thick stencil leaves a thicker ink layer on the edge of its through hole area.
Especially in tone screen printing, the thickness of the stencil affects the amount of ink attached, the screen supports the entire area of the dot to be printed, the thicker the stencil, the thicker the printed ink layer. If the stencil is too thick, it may cause the dot loss in the highlight area, and the dots in the dark area will be blurred, thereby changing the tone. At the same time, accurate color reproduction cannot be achieved due to excessive ink adhesion.
3. The surface of the stencil and the prevention of moiré
When doing color tone printing, the first thing to consider is the appropriate dot size corresponding to the mesh number of the screen. When the dots are too small (the opening area on the stencil is too small) and all or part of the ink in printing cannot pass through the mesh, it is easy to appear moiré.
Moire is easy to produce, but as long as the template is selected correctly or the template is handled correctly, moiré can be avoided.
