Use these instructions to help reduce waste and provide consistent proportions when measuring the amount of investment to the amount of water needed for each size of the flask.
RECOMMENDED WATER/POWDER RATIOS
Regular Castings
Ladies’ rings, pendants, filigree and intricate wax patterns
Heavy Castings
Heavy ladies’ rings, mens’ rings and school rings
INVESTMENT MIXING INSTRUCTIONS
To get the number of pounds of investment needed to fill any particular flask, divide the cubic inch content of the flask by 20. To get flask content in cubic inches. Round Flask = 0.7854 x dia.2 × height. Square Flask = width × length × height.
1
Weigh
investment
2
Measure
water
3
Add investment to water
4
Mix for 3 to 3 1⁄2 minutes
5
Vacuum 20 seconds after bell
6
Pour mixture into flask
7
Vacuum up to 90 seconds
8
Leave still for two hours
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