1、The environment is truly important , so keep the nozzle and barrel clean will decrease defective.

2、According to different material ,Standardization of forming conditions for production : Because of the sensitivity of white products to temperature, if the temperature is too high or the baking time is too long, the color will turn yellow.
3、Regularly , when we molding white products , if you pause machine over 3 minutes , all need to eject out a part of the plastic , to avoid two problems , first one is product be carbonized beacause the material is baked too long , the second  is avoiding chromatism due to so much time.

4、When molding white products , we shuld especially pay attention to the environment and sanitation for keeping the raw material , to avoid mixed colors due to management problems . 
5、We recommend to use black special shading belt for keeping white products sample, to avoid the sample changing color while  without shelter ;According to different material to changing samples unregularly, to avoid the chromatism during mass production.