How to effectively control screen printing parameters?

How to effectively control screen printing parameters?
Screen Selection: Matching ink fineness with pattern accuracy
Ink Fineness: For standard silicone inks (pigment particle size 10-20μm), choose an 80-120 mesh screen; for fine patterns (such as text and lines), choose a 150-200 mesh screen (a higher mesh number results in finer prints, but also thinner ink thickness).
Screen Tension: 30-35N/cm² (Insufficient tension can cause screen deformation and pattern misalignment). Use a tension meter to check before printing.
Scraper Parameters: Determine ink thickness and uniformity.
Scraper Material: Choose a polyurethane squeegee (hardness 60-70 Shore A; lower hardness can cause ink leakage, while higher hardness can cause scratches on the screen).
Scraper Angle: 45°-60° (A smaller angle results in thicker ink, while a larger angle results in thinner ink. Adjust according to your needs. For example, for a thicker ink layer for a wear-resistant pattern, choose 45°; for a thinner ink layer for a fine pattern, choose 60°). Squeegee pressure: Requires consistent contact between the screen and substrate, ensuring even ink transfer (typically 5-10N). Too little pressure will result in a visible bottom layer, while too much will result in thinner ink and screen wear.
Printing speed: Maintain a steady and consistent speed to avoid air bubbles.
Speed: 30-50 mm/s (a faster speed will introduce air and create bubbles; a slower speed will cause the ink to dry on the screen, resulting in "screen clogging").
Squeegee start/end: ​​Slowly contact the screen when starting and quickly release it when ending (to prevent ink from sticking back). After printing, gently peel the screen off (vertically upwards to prevent pattern distortion).