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| TROUBLE | POSSIBLE CAUSES | POSSIBLE SOLUTIONS |
| 38. Pinholing.. | 1. Humidity of the powder too high. | 1. Check storage facilities. Powder shall be stocked at room temperature in closed packing (maximum humidity 75%). |
| 2. Air entrapment with casting. | 2. Preheat objects over 320°F (160 °C) and cool down before applications (only galvanized), or contact your powder supplier, who can advise you a special developed powder. | |
| 3. Gas entrapment and escaping due to chemical reaction. | 3. Keep coating thickness below 100 microns; if necessary contact your powder supplier. | |
