1 Use plastics with sound glossiness (such as ABS and PP etc), appropriately add additives which can improve the glossiness of products, and reduce the content of volatiles in raw materials (such as lubricating agent);

2 Dry the raw materials sufficiently. Improve plastication condition of plastics, increase back pressure, improve plastication quality and properly reduce melt temperature;

3 Increase injection pressure and injection rate, and ensure sufficient dosage of injection; reduce dosage of mold release agent;

4 Properly improve mold temperature; optimize design of feed system and product structure to improve flow status of melt in the mold and to avoid such phenomenon as turbulence flow;

5 Improve the exhausting capacity of molds, and properly set exhausting position; add cold-slug well or increase volume of the well;

6 Check whether leakage occurs to the hot and cold medium channels;

7 Polish surface of mold cavity. Sometimes the surface of products can be designed into frosted surface to settle the problem of glossiness.