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       Air bubbles in pattern
 
Usually caused by Cured by
Air pressure too high. Adjust air pressure.
Wax pot low on wax. Add wax.  Be sure that wax pot is more than ½ full.
Wax too hot or cold. Adjust temperature and stir wax to release trapped air.
Mould held at wrong angle to nozzle. Hold mould on same plane as nozzle.
 
  Casting problems
  Wax pattern problems
  Mould rubber problems
Mixing guide
De-wax and  burnout cycles
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