SIAM CASTING POWDERS LTD.
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SCP - Products
INVESTMENT
POWDERS
POWDERS
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Investment Powders
Siam Casting Powders
Gemstar
SACK : 22.7 Kg
Drum : -
Siamcast Gemstar is a special application investment powder, which has been developed specifically for stone casting or wax setting. The use of Siamcast Gemstar allows the setting of stones in the wax before casting, thereby ensuring improved productivity.
Product Detail
Gemstar
Features
- Provides heat shield for stones up to mould temperature of
630oC. - Setting time adjusted to give sufficient time for mixing and
vacuuming without rushing. - Fluid slurry for easy flow around the wax and stones.
- Excellent surface finish for all metals.
- High strength investment for consistent quality of casting.
Technical Data
| Powder / Water Ratio : | 100/38 |
| Working Time @ 25c Slurry Temp : | 8-9 min. |
| Gloss Off Time @ 25c Slurry Temp : | 11 – 13 min. |
| Thermal Expansion At 750c : | 1.2% |
WATER TO POWDER RATIO
| Machine Vacuum Mixing | 38 : 100 |
| Hand Mix Then Vacuum | 38 : 100 |
| Use de-ionised water Weigh water and powder Slurry temperature 21 ํC Leave for 90 min to stand before burn out |
| MACHINE VACUUM MIXING | |
|---|---|
| 0 min | Weigh out water & powder Add powder to water |
| 1 min | Mix under vacuum |
| 0.5 min | Stop mixer and scrape blades |
| 3.5 min | Mix under vacuum |
| 2 min | Pour flasks |
| 1 min | Vacuum flasks |
| 8 min | Total time taken |
| HAND MIX THEN VACUUM | |
|---|---|
| 0 min | Weigh out water & powder Add powder to water |
| 1 min | Mix by hand |
| 3 min | Mix with machine |
| 1 min | Vacuum mixer bowl |
| 1 min | Pour flasks |
| 2 min | Vacuum flasks |
| 8 min | Total time taken |
