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| Usually caused by | Cured by |
| Overheating the metal. | Reduce metal casting temperature. |
| Inadequate burnout. | Increase the time at 740oC. |
| Flask overheated during burnout. | Ensure maximum burnout temperature does not exceed 740oC. |
| Torch flame incorrectly set. | Ensure that the flame is not oxygen rich. |
| Impurities in the metal. | Do not use more than 50% recycled alloy and ensure it is clean. |
| Casting problems | |
| Wax pattern problems | |
| Mould rubber problems | |
| Mixing guide | |
| De-wax and burnout cycles | |
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