Category Archives: EN – Defects

HEAT BUBBLES

EN - Defects

REASONS

  • Insufficiently dried UV water coating before UV curing.
  • Excessive intensity of UV lamps.

PREVENTION

  • Increase the temperature in the dryer.
  • Increase the speed of the belt in UV dryer.
  • Reduce the intensity of UV lamps.
  • Extend the drying time of the coating.
  • Apply a thinner layer of coating.

SOLUTION

  • Sand the surface down to the base/substrate.
  • Re-apply the lacquer according to the recommendations.

For more information, do not hesitate to contact us.

BUBBLE FORMATION

EN - Defects

REASONS

  • Excessive amount of lacquer in one coat, application of several coats of lacquer with too little intermediate drying, the lacquer is too thick.
  • The temperature and air circulation rate in the room are high or the evaporation time is too short.
  • Incorrect thinner.
  • Wood/substrate humidity, substrate temperature are too low.
  • The distance between the spray gun and the workpiece is too small, the viscosity is too high due to the low lacquer temperature.

PREVENTION

  • Adjust the application, intermediate drying time, viscosity.
  • Follow the instructions for use.
  • Lower the temperature and air velocity in the room, extend the drying time by adjusting the conveyor speed.
  • Increase the moisture of the wood/substrate, pre-temper the substrate.
  • Use the right spraying method, thin the lacquer, increase the lacquer temperature to the prescribed limit.

SOLUTION

  • Sand the surface down to the base/substrate.
  • Re-apply the lacquer according to the recommendations.

For more information, do not hesitate to contact us.

ORANGE PEEL

EN - Defects

REASONS

  • The lacquer is insufficiently levelled (oversized droplets).
  • A large temperature difference between the lacquer and the surface.
  • Incorrect pressure when lacquering or incorrect distance from the surface.
  • The temperature and air velocity in the room are too high.
  • Drops of lacquer that are too dry fall onto the workpiece.

PREVENTION

  • Lower the viscosity, increase the pressure, and use a smaller nozzle.
  • Check and adjust the temperature difference between the lacquer and the surface.
  • Set the spray gun and follow the instructions.
  • Lower the temperature and air circulation rate.
  • Use a slow thinner, check the distance between the workpiece and the spray gun, increase the flow of the lacquer.

SOLUTION

  • Sand the surface down to the base/substrate.
  • Re-apply the lacquer according to the recommendations.

For more information, do not hesitate to contact us.