Because the hardness of PP plastic pepper ball is not high, the polishing effect will be much worse if POM is used to polish it, and the surface will show a rough effect. Therefore, the polishing method of PP plastic pepper ball in plastic pepper ball is the most special, because the specific gravity of PP plastic pepper ball is light, while the specific gravity of POM plastic ball is high, but different polishing effects will appear when polished with the same equipment.

POM plastic pepper balls are polished by a drum polisher. The abrasive used for polishing and POM plastic balls have a large proportion, which can be fully mixed together in the polishing process. However, PP plastic pepper balls have a light proportion. When polished by a drum polisher, PP plastic pepper balls will always float on the polishing solution and cannot be fully mixed with the abrasive, so the polishing effect will be much worse. The polishing machine used for PP plastic pepper balls is a vortex polisher. The working principle of the vortex polisher is centrifugal force.