When the surface of the plastic product is painted, the brightness of the product can be guaranteed. Because the plastic product itself is very difficult to reflect. 

Therefore, the plastic parts look darker, and if the skin texture on the surface of the plastic parts is added, it is even more dim. 

Therefore, some customers will spray a layer of paint on the surface of the plastic parts in pursuit of the aesthetic appearance of the surface. 

This ensures the brightness of the product.

By painting the surface of plastic products, the scrap rate of plastic products can be reduced. 

The scrap rate of white plastic products has always been a headache for the injection molding industry. 

If the surface is painted, it will cover the shortcomings of the product and reduce the scrap rate of the product.

Therefore, it is very useful to paint the surface of plastic parts that have requirements. However, if painting, there is another process for injection molding. 

The cost will be increased.