What are the causes and solutions of screen printing defects?

When the surface glaze is applied to the printing place, it is not dry or too dry (powder), or the viscosity of the surface glaze is not enough, it is easy to fool the net. You can press the glaze with your fingers to see if it is tilted and judge whether the glaze is suitable for printing; Gently stroke the glaze with clean hands to determine whether there is white powder and whether the glaze viscosity is appropriate; The last printing glaze is not dry, resulting in the next printing screen; The lubricity of glaze is not enough, which leads to delusion; The fineness of flower glaze is not enough, which is easy to block the flower net, resulting in the color becoming lighter and lighter; The formula of flower glaze is not suitable, which affects the passability of flower glaze, leading to the closure of the net and the color becoming lighter; Improper pressure and angle of the flower knife lead to the illusion of the net; Insufficient washing in the process of making flower net affects the passability of flower glaze, resulting in shallow printing; The exposure time of the screen is not enough, and it is easy to degum when printing, which leads to the rapid change of printing color; Improper use of mesh number, too large or too small tension of flower screen will affect printing effect and blind screen.