General Mixing Directions
Hand Spatulate powder into liquid thoroughly,
then mix under vacuum on low speed mixers (200 to 450 rpm)
for 60 to 90 seconds. Always monitor the liquid and powder
temperatures before mixing. Hold under vacuum for another
30 seconds before pouring into the casting ring.
If the material appears to be setting too fast reduce mixing
time to as low as 30 to 45 seconds or cool the liquid to
desired temperature as explained elsewhere.
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Properties At 100% Liquid:
Liquid to Powder Ratio: 27 to
100
Liquid Dilution: See directions below
Working Time: 5 minutes min. at 72F
Setting Time: 8 to 12 min. at 72F
Setting Expansion: 1.7 to 2.4 %
Thermal Expansion: @700 C: 1.6-1.8%
DO NOT USE FAST BURN-OUT.
DO NOT USE RINGLESS PROCESS.
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Burn-out:
After 20 to 30 minutes bench set place the mold directly in
a cold oven. Raise temperature slowly at 7 to 10 degrees F per
minute to casting temperature of 900 to 1200 degrees F ; hold
for about 30 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.
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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