Why The Surface Hardness Or Scratch Resistance Is Not Good After Spraying Powder Coating？
1. Insufficient curing
Solution: Pls reference the last blog
2. Excessive curing and coating brittleness will also reduce hardness
Solution: Pls reference the last blog
3. Baking temperature rise rate is too slow, in the slow melt flow process, some leveling additives migrate up to the surface of the coating film
Solution: Increase the heating rate
4. Quality problems of the powder itself or quality deterioration in storage
Solution: Replace powder coatings or improve formulations
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