The paint film   is too thick.

Adjust the   coating method and choose the suitable thickness of the paint film

The solvent   evaporates too fast and the humidity is too high, causing condensation.

Control the   temperature and humidity of the painting environment.

IR leveling   temperature is too low or time is not enough in UV system.

Increase IR temperature   or extend IR time (Construction strictly in accordance with the construction   process.)

Solvent   evaporates too slowly in UV system.

Control the   temperature and humidity of the coating environment and appropriately   increase the IR temperature or extend the IR time.

Part of the UV   energy radiation is not in place due to the complexity of the workpiece in   the UV system.

Reasonably adjust   the placement of UV lights.

Incomplete curing   and low UV exposure energy in UV system.

Increase   exposure energy.

UV light aging   in UV system.

Replace the   light.