Powder film discoloration.

Problems

1, The coating surface has a residual treatment solution

2, Excessive baking, or volatile gases in the furnace

3, Mixed with other pigment powder during construction

4, The pigment itself of the powder is not resistant to high temperatures or yellowing of the resin

Solution

1. Improve the pre-processing method

2. Develop appropriate baking conditions to purify the baking oven

3. Strengthen the cleanup before construction

4. Replace qualified powder coating