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Slow Burnout:
After 20 to 30 minutes bench set place the mold directly
in a cold oven. Use 2-stage burnout. First Raise temperature
slowly at 7 to 10 degrees F per minute to 600 degrees F;
hold for about 30 minutes and then raise the temperature
rapidly to desired mold temperature. Hold for about 30 to
40 minutes and cast.
ADJUSTING EXPANSION:
To INCREASE expansion:
Use more liquid and less water. Keep the total amount of
mixing liquid the same as in the chart. If more expansion
is needed even after using straight 100% liquid, mix for
less time, say 30 seconds mechanically under vacuum at low
speed. If still more expansion is needed order the high
expansion GREEN liquid and follow the instructions for this
liquid.
To DECREASE expansion:
Use more water and less liquid. Do just the opposite
of the technique for increasing expansion above.
FOR BEST RESULTS
The Average of the temperatures of the LIQUID and the POWDER
should be 72 Degrees F. If the POWDER temperature is TOO
HIGH then the LIQUID temperature should be LOWERED so that
the AVERAGE of the TWO is about 72 Degrees F.
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