Common problems in the use of silicone ink
| Common Problems | Root Causes | Solutions |
|---|---|---|
| Poor ink adhesion, peeling off easily when torn | 1. Mold release agent not completely removed from the substrate; 2. Ink does not match the substrate; 3. Incorrect curing agent ratio / Insufficient curing time | 1. Clean the substrate again with isopropyl alcohol; 2. Replace with special ink; 3. Increase the curing time by 5 minutes at 150°C |
| Bubbles after printing | 1. Air introduced during ink stirring, no standing for defoaming; 2. Excessive printing speed, introducing air; 3. Moisture on the substrate surface | 1. Let the ink stand after stirring until the printing speed is below 30mm/s; 2. Ensure the substrate is dry |
| Ink remains sticky after curing | 1. Insufficient curing agent added; 2. Oven temperature insufficient (actual temperature lower than the set value); 3. Curing time too short | 1. Supplement according to the standard ratio (measure with a thermometer); 2. Increase the curing time to 25 minutes |
| Rough edges of patterns | 1. Too low mesh count of the screen (ink too coarse); 2. Too small scraper angle / Excessive pressure; 3. Too hard pad printing head | 1. Replace with a screen with a higher mesh count; 2. Adjust the scraper angle to 55° - 60° |