Potential Problems in Printing – Description of Problems and Proposed Solutions
Problem | Solution |
---|---|
1. Too thin. | 1. Add thinner. |
2. Ink build-up on pad. | 2. Use faster thinner. |
Problem | Solution |
---|---|
1. Etching too deep. | 1. Produce new cliche with shallower etching depth. |
2. Wrong screen ruling. | 2. Produce new cliche with fine half-tone screen. |
Problem | Solution |
---|---|
1. Wrong pad shape. | 1. Use more tapered pad form. |
2. Surface too rough. | 2. Replace pad. |
Problem | Solution |
---|---|
1. Surface becomes charged with static electricity. | 1. Install ionizing unit on printing press. |
Problem | Solution |
---|---|
1. Humidity too low. | 1. Raise humidity to approx. 60 % – 80 %. |
2. Cycle time too fast. | 2. Reduce printing speed. |
3. Intermittent operation of machine. | 3. Regulate to constant cycle times. |
Improvement can be achieved by grounding press. Splotches or spiderwebs most often occur with materials such as polystyrene, polycarbonate, or acrylics.