In screen printing, the printing accuracy of the replica is closely related to the screen. The number of screen meshes has an important influence on the reproduction of the fine lines of the original. Therefore, to carefully select the screen, the number of screen meshes must correspond to the fine lines of the printing. Make the selected screen specifications have the performance of reproducing the fine lines of the original, etc., so as to ensure the printing effect.
Fine lines in screen printing generally refer to the line width between 0.1 and 0.2 mm.
The thinnest width of fine lines reproduced by the screen refers to the width value of the thinnest lines that the selected screen can reproduce in screen printing. This is usually directly related to the screen and mesh width. When selecting the screen, the following formula can be used as a basis for selecting the screen calculation. The formula for calculating the thinnest line width:
K=2S+R In the formula: K represents the width of the thinnest line, S represents the screen wire diameter width value, and R represents the mesh width.
Calculation example: If a 200 mesh/inch nylon screen is selected, what is the thinnest width of the reproduced line?
Check the NM200-inch screen, the wire diameter (S) is 0.05 mm, the mesh width (R) is 0.077 mm, and substitute it into the above formula, and we get K=2×50+77=177=0.177 mm. Then the thinnest width of the line reproduced by the NM200 mesh/inch screen is 0.177 mm.