In mesh screen printing products, a common problem is the printing ink film edge jagged margin (including incomplete or broken). There are many reasons for burr, but the main reason is the quality of the screen printing plate itself.

(1) the low resolution of photosensitive adhesive leads to broken or incomplete lines.

(2) insufficient or too long exposure time, insufficient development, uneven screen printing text edge, jagged. Good screen printing plate, text and text edge should be smooth and clean.

(3) uneven screen printing surface, printing, screen printing and substrate gap, ink suspension penetration, resulting in printing ink edge burr.

(4) in the printing process, mold expansion and longitude expansion degrees are different, resulting in uneven phenomenon on the surface of the mold, the gap between the screen printing plate and the substrate, ink suspension penetration, ink film will appear burr.

To prevent jagging, consider the following solutions:

(1) select high mesh number screen production;

(2) select high-resolution photosensitive materials for plate making;

(3) make a screen printing plate of a certain thickness to reduce the expansion of deformation;

(4) as far as possible, use the oblique tension network method, the best Angle is 22.5°;

(5) fine line printing, try to use the indirect plate making method because the indirect plate making method appears less burr;

(6) in the process of plate making and printing, try to control the temperature expansion factor;

(7) improve the quality of plate making, to ensure that the screen printing plate smooth, neat screen edge;

(8) screen printing plate using spray gun spray washing, to improve the effect;

(9) screen and substrate spacing, scraper Angle, printing pressure to be appropriate.

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