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Investing and Bubbles
Posted by Dan Caster on March 14, 1999 at 19:55:41:
I am taking a bronze casting class in Washington State at Olympic College.
I am getting lots of bubbles on the surface of the castings from small air bubbles trapped in the investment next to the wax. It is pretty discouraging to spend hours getting them off. What do you do to prevent this from happening? I read the discussions on the internet on wax and investing, but don't understand how to best prevent this. The instructor believes in spraying the wax with Sprayfixit to reduce the surface tension. There is no way to pull a vacuum on the investment at school to de-air it. I
Could you give me some tips on how to improve my investing to eliminate these casting defects? It wouldn't hurt to add these to the archives.