What causes paint to wrinkle after baking? Thick application and sudden heating.
When taken out of the curing oven, the surface of the coating film is wrinkled. This explains the cause of the "shrinkage," where only the surface hardens first, as well as the management of coating thickness and temperature rise.
The surface of the parts taken out of the furnace is shrunk like wrinkles. It looked nice right after painting, but defects appeared after baking. 【First, please look here】 □ Only the thickly painted areas have wrinkles → Too much paint was applied at once □ Fine wrinkles appear all over the part → The temperature rises immediately after entering the furnace, causing the surface to harden first □ Only the areas with multiple coats have wrinkles → The top coat is applied before the underlying paint film has completely dried 【Why this happens】 When the surface hardens first, the paint inside shrinks later, pulling on the surface. This force causes the surface to ripple and wrinkle. 【Countermeasures you can implement starting today】 1. Control the thickness of each coat and apply thin layers 2. Allow a setting time after painting before placing it in the furnace 3. For multiple coats, establish and adhere to the drying time of the underlying paint film 【Free Materials】 You can download a guide summarizing how to identify and address painting troubles for free from the related catalog on this page. Eiwa Kogei adjusts conditions for painting from test coatings to mass production using three types of equipment.
- Company：永和工芸
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