Potential Problems in Printing – Description of Problems and Proposed Solutions
Problem | Solution |
---|---|
1. Too thin. | 1. Use new ink. |
2. Too slow. | 2. Use faster thinner. |
Problem | Solution |
---|---|
1. Etching too deep. | 1. Produce new cliche with shallower etching depth. |
2. Wrong screen ruling. | 2. Test new cliche with different fineness of halftone screen. |
3. Wrong cliche type. | 3. Use different cliche type. |
Problem | Solution |
---|---|
1. Too soft. | 1. Use harder pad. |
2. Too little volume. | 2. Use larger pad |
3. Prints over edges. | 3. Correct head stroke. |
4. Stroke force on cliche and substrate not equal. | 4. Correct head stroke. |
Problem | Solution |
---|---|
1. Very irregular surface. | 1. Use pad assembly or special pad. |
2. Surface not sufficiently precleaned. | 2. Pre-clean surface. |
3. Material not smudge free. | 3. Switch to different material. |
Problem | Solution |
---|---|
1. Jig not fastened tightly enough. | 1. Tighten fixture. |
2. Jig unstable. | 2. Produce new cliche. |
3. Jig not precisely made, object has too much play. | 3. Produce new cliche |
4. Cliche not doctored cleanly. | 4. Sharpen or change doctor blade |
This deficiency often occurs when thinner is added during printing run, where ink and thinner are not properly mixed.