Address
31 York Road, North End
Port Elizabeth
South Africa
Contacts
Email: admin@imvusainks.co.za
Phone: +27 (0) 41 492 3347
| CAUSE | SOLUTION |
|---|---|
| Too much ink on the rollers. | Reduce the inking. |
| Rollers incorrectly adjusted. | Check the pressures (reduce if necessary). |
| Incorrect pH or imbalance in the fount solution. | Check the fount solution and correct if necessary. |
| Temperature of inking rollers too high. | Lower the temperature of the printing units or renew the ink regularly. |
| Too much water in the ink. | Reduce the amount of dampening if possible. |
| Unsuitable ink. | Consult the supplier. |
| CAUSE | SOLUTION |
|---|---|
| Ink too “sticky” or “tacky” for the substrate used. | Reduce the stickiness or tack of the ink (add UV Tack Reducing Paste or UV Thinner |
| Paper coating too fragile. | Change the paper. |
| Unsuitable blanket lining. | Adapt the linings as per the manufacturer’s recommendations. |
| Substrate temperature too low. | Store the substrate at the same temperature as the print shop and follow the recommendations of the substrate manufacturer. |
| Unsuitable colour sequence. | If possible, do not apply the densest colours on the first printing
units |
| CAUSE | SOLUTION |
|---|---|
| Too much water in the water / ink balance. | Adjust the amount of fount solution. |
| Unsuitable ink. | Consult the supplier. |
| Printing speed not adapted to the number and power rating of the UV lamps. | Reduce the printing speed while maintaining the same output
from the lamps, or modify the drying installation in order to increase the overall power output. |
| Unsuitable dryers sequence. | Adapt the sequence to suit the print run. |
| High inking levels. | Reduce the inking levels or adapt the colour. |
| The dryer requires maintenance. | Check the condition and efficiency of the lamps, the number of
hours used and the reflector cleanliness. |
| Too much water in the ink. | Reduce the dampening if possible. |
| Unsuitable ink. | Add Photoinitiator to the ink in the recommended proportions. |
| Specific cases: Drying of black. | Use iron doped lamps.
Use 2 printing units to prints blacks with OD above 2.00. |
| Specific cases: Drying of white. | Use gallium doped lamps. |
| CAUSE | SOLUTION |
|---|---|
| Dirty or badly cleaned rollers. | Clean or deglaze the rollers. |
| Rollers incompatible with the ink. | Check the rollers are compatible with UV inks. |
| Temperature of the ink too low. | Store the ink at the temperature of the print shop (or use a mixer). |
| Viscosity of the ink unsuited to the press | Add UV Thinner or consult the supplier. |
| CAUSE | SOLUTION |
|---|---|
| Too much water in the water / ink balance. | Adjust the amount of fount solution. |
| Incorrect surface treatment or surface treatment that is out of date. | Check the surface tension of the substrate or consult the supplier to find out if the treatment is still valid. |
| Unsuitable ink. | Consult the supplier. |
| CAUSE | SOLUTION |
|---|---|
| Inks stored at a too high temperature or in sunlight with the containers open. Inks kept for longer than one year. | Check the storage conditions of the UV inks and how stocks are rotated. |
31 York Road, North End
Port Elizabeth
South Africa
Email: admin@imvusainks.co.za
Phone: +27 (0) 41 492 3347
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