Rit dye plastic is a very important part of any industry that needs plastic products. As we all know, the processing of each kind of plastic parts needs different color treatment. It is precisely under such market demand that the market development of rit dye plastic is getting better and better.

　　Most of the raw materials for rit dye plastic are transparent or milky white, and plastic parts often put forward various requirements for color. The parts in optical instruments need black to prevent light leakage and eliminate stray light. The appearance parts often use different colors according to the design needs. Therefore, dyeing is required before the processing of plastic products. Generally speaking, there are three main dyeing methods for plastic products:

　　1. Dry staining. Put a certain proportion of dye and plastic pellets into the rotating drum, and add 0.01% ~ 0.1% zinc stearate or white mineral oil as wetting agent to make the plastic easy to bond with the dye. Rotate the drum to completely mix the plastic and dye evenly.

　　2. Extrusion dyeing method this method is to mix the dye and plastic according to the dry dyeing method, then squeeze them into a thin strip with a special extruder and cut them into granules.

　　3. Dry dense staining. This method is basically the same as extrusion dyeing, except that the proportion of dyes in plastics is more than 10 times higher than usual.