This may be due to the poor quality of dispersant or auxiliaries selected by the manufacturer, which causes poor diffusion and inter-solubility and affects the physical and mechanical properties of the products.

The color masterbatch is not carefully tested and the pigment is too little or too much Inaccurate measurement at the time of use, domestic enterprises, especially small and medium-sized enterprises, the phenomenon of random measurement exists in large numbers The matching of masterbatch and resin is problematic, which may be due to the improper choice of carrier of masterbatch, or the manufacturer may change the resin variety at will Improper temperature of the machine, the masterbatch stays in the masterbatch machine for too long Handling procedure: Firstly, check whether the resin variety matches with the masterbatch and whether the measurement is accurate, then adjust the machine temperature or speed, if there is still a problem, contact the masterbatch manufacturer.

This is often caused by the injection molding machine. Different injection molding machines have different mechanical conditions due to different manufacturing, usage time or maintenance conditions, especially the difference in the tightness of the heating element and the barrel, so that the dispersion of the masterbatch in the barrel is not the same, and the above phenomenon will occur.

Some masterbatches have high pigment content (or dyestuff), in this case, the migration phenomenon is normal. Especially for the masterbatch with dyestuff added, serious migration phenomenon will occur. But this does not affect the quality of the products, because after the color masterbatch is injected into the products, the pigment is in the normal color development concentration in the products."

The density and melt index of different resin brands will be different, so the performance of the resin will be different, and the compatibility with the masterbatch will be different, thus the color will change.