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Paint powder defects

There are certain disadvantages, such as:
 
Difficulty getting layers :
The difficulty of obtaining high-quality coating layers (25 μm) with powder is more difficult than wet paint systems. However, public economics, to apply any kind of powder, is still thicker, than others.
 
Slow color change :
Increase the speed of color change, with liquid paints for powder. However, the development of equipment and cleaning mechanisms has significantly reduced the time of color change in recent years.
 
The powder could not be blended :Can not mix powder, for different colors. This is not very important; industrial coatings use paints or powder that actually correspond to certain grades.