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| Conventional mixing | ||
| Vacuum mixing | ||
| Mixing instructions | ||
| GS Ultima | ||
| GS XL | ||
| GS Plus | ||
| Investrite | ||
| GS 21 | ||
| GS Gemset | ||
| Platincast | ||
1
Determine the weight of powder and the volume of water.
2
Weigh out the powder and measure its temperature.
3
Adjust the water temperature so as to give a slurry temperature of 20ºC.
4
Measure the required volume of water into a clean mixing bowl.
5
Add the powder to the water.
6
Mix by hand for 30 seconds, to break up any lumps.
7
Mix by machine for a further 3 minutes.
8
Vacuum the investment in the bowl (not more than 2 minutes).
9
Pour the investment slowly down the side of the flask until the wax patterns are covered.
10
Vacuum the investment in the flask (not more than 1½ minutes).
11
Let the flask stand undisturbed (at least 3 hours). They can become quite hot during setting, this is a normal occurrence.
12
Remove sprue base and collar.
13
DO NOT STEAM DEWAX. Place flask in furnace and follow an appropriate burn-out cycle below:
| 20 to 300ºC at 200ºC / hour | |
| Soak at 300ºC for 3 hours | |
| 300ºC to 990ºC at 100ºC / hour | |
| Soak at 990ºC for 3 hours (for some applications this may be increased to 1000ºC) | |
| Cast at 500ºC |
14
Cast with metal.
