What are the disadvantages of powder coatings?

There are certain disadvantages to using thermosetting powders and these include:

Thin films difficult to obtain

Thin films (µ25 microns) are more difficult to obtain with powders than with wet paint systems.  However, the overall economics of applying a somewhat thicker coating of powder could still prove favourable.

Color change is slower

Color change is more rapid with liquid paints than with powders.  However, improvements in application equipment and cleaning techniques has reduced this time considerably in recent years.

 

 

Powders cannot be mixed

Powders cannot be mixed with one another to obtain different colours.  However, this is not considered vital as most industrial coaters use paints or powders already matched to specific shades.