POM plastic pepper balls have high hardness and good wear resistance. However, during the polishing process of POM plastic pepper balls, the problems of low surface finish and yellowish color occurred. The main reasons are that the abrasive and technology used for polishing are not in place, and the model of polishing solution is not selected correctly.

In order to achieve the ideal effect, POM plastic pepper ball polishing is actually divided into two processes: rough polishing and fine polishing. Some plastic ball manufacturers only use one process to polish it in order to save costs. As a result, the surface of POM plastic pepper ball looks shiny, but under the magnifying glass, it can be seen that the surface of POM plastic pepper ball is still bumpy and pitted, mainly because there is no rough polishing process and the rough surface is not smoothed. The main reason for the yellowing of POM plastic pepper ball surface is that the polishing solution is used for too long.