On October 15, 2021, thermosetting powder coating manufacturers shared the reasons and solutions for the discoloration of their paint films
cause:
1. There is residual treatment liquid on the painted surface.
2. Excessive baking, or volatile gas in the oven.
3. Mix powder of other colors during construction.
4. The pigment of the powder itself is not resistant to high temperature or the resin is easy to yellow.
Solution:
1. Improve the pre-processing method.
2. Formulate proper baking conditions and purify the oven.
3. Strengthen the cleaning before construction.
4. Replace with qualified powder coating.
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