UV flatbed printing delivers stunning, durable results on a wide range of materials – from acrylic to wood and metal. However, even the best machines encounter occasional hiccups. Here are the most common UV printing issues faced by Gotocolor users, along with expert solutions to keep your production running smoothly.
Poor Ink Adhesion
Symptoms
- Prints easily scratch off
- Ink peels after handling
- Uneven adhesion across the surface
Possible Causes
- Printing on untreated or incompatible materials
- Dust, oil, or residue on the substrate
- Incorrect primer usage or absence of primer
Solutions
✅ Clean the substrate thoroughly with isopropyl alcohol before printing
✅ Use material-specific primers (glass, metal, PP, etc.) to enhance adhesion
✅ Ensure the printer’s UV lamp power and curing speed are set according to material thickness and ink type
2. Banding in Prints
Symptoms
- Horizontal lines across prints
- Uneven color distribution
Possible Causes
- Clogged nozzles or misaligned printhead
- Incorrect bi-directional calibration
- Using low-quality or expired inks
Solutions
✅ Perform a nozzle check and cleaning cycle before each production session
✅ Re-calibrate the printhead alignment and bi-directional settings via the RIP software
✅ Use original or approved UV inks to prevent pigment separation and clogging
3. Dull or Washed-Out Colors
Symptoms
- Prints appear faded or lack vibrancy
- Colors don’t match the design file
Possible Causes
- Incorrect ICC profile or color management settings
- Insufficient ink laydown or pass count
- UV lamp over-curing (burning out colors)
Solutions
✅ Ensure you’re using the correct ICC profile for your Gotocolor printer and specific substrate
✅ Adjust ink limit and pass count settings in your RIP software to increase saturation
✅ Reduce UV lamp intensity or curing time if colors appear burned or dull after curing
4. UV Lamp Curing Errors
Symptoms
- Ink remains sticky after printing
- Incomplete curing leads to smudging
Possible Causes
- UV lamp nearing the end of its life or malfunctioning
- Incorrect curing speed or lamp power settings
- Thick ink layers requiring higher curing intensity
Solutions
✅ Inspect lamp hours regularly; replace if near end-of-life as curing efficiency drops
✅ Adjust lamp power settings and carriage speed to allow sufficient exposure
✅ For thicker layers (e.g. white ink underbase), slow down carriage speed or increase lamp power incrementally
5. Ink Spreading or Bleeding
Symptoms
- Edges of prints appear blurry
- Small details are lost
Possible Causes
- Excess ink laydown for the material type
- Low surface tension or primer incompatibility
Solutions
✅ Reduce ink limit settings in RIP software for that substrate
✅ Test with different primer formulations for improved surface tension control
✅ Print a small sample first to adjust parameters before full production runs
Final Expert Tips for Consistent UV Printing
✔️ Daily nozzle check and cleaning keep the printheads healthy
✔️ Store inks properly, sealed and away from direct sunlight
✔️ Maintain stable workshop temperature and humidity to ensure consistent curing and ink behavior
✔️ Regularly clean your UV lamp’s protective glass to maintain full curing power
Conclusion
Gotocolor UV flatbed printers are built for reliability and high-quality output. By applying these troubleshooting techniques and preventive maintenance practices, you’ll maximize printer performance, minimize downtime, and deliver premium products that delight your customers.
💡 Need technical support or spare parts?
Contact our Gotocolor service team today for expert assistance to keep your business running at peak efficiency.
