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Ransom & Randolph SC-X Investment is a professional-grade casting investment formulated for jewelry and fine art lost-wax casting. Based on the SC20 formula, SC-X contains a higher percentage of cristobalite, making it especially well-suited for casting white gold as well as other gold alloys, silver, and metal alloys. Composed primarily of powdered silica (quartz), cristobalite, and a gypsum (calcium sulfate) binder, SC-X is mixed on-site with water by the user prior to use to form precision casting molds.
Features
- Based on the SC20 formula with a higher cristobalite content — optimized for white gold casting
- High compressive strength and low thermal expansion for dimensional accuracy
- Withstands rapid and high-temperature burnouts without cracking
- Produces smooth, lustrous surface quality with high detail reproduction
- Suitable for casting gold, silver, and other metal alloys in lost-wax applications
Specifications
| Formula Base | SC20 with elevated cristobalite content |
|---|---|
| Primary Composition | Powdered silica (quartz), cristobalite, gypsum (calcium sulfate) binder |
| Recommended Mixing Ratio | 38–40 mL water per 100 g powder |
| Recommended Use | Lost-wax casting of jewelry and fine art pieces |
| Best Suited For | White gold; also suitable for yellow gold, silver, and other metal alloys |
| Package Size | 100 lb |
| Prop 65 Warning | Contains crystalline silica — see Notes |
Notes
Prop 65 Warning: This product contains crystalline silica, a substance known to the State of California to cause cancer. Always use appropriate respiratory protection and follow safe handling procedures when mixing or working with this investment powder.
California Prop 65 Warning:Cancer and Reproductive Harm. www.P65warnings.ca.gov.
- Brand
- Ransom & Randolph
- Part #
- 121.735
- Type
- Investments
- Country of Origin
- United States
- Dimensions
- 14 in x 12 in x 20.25 in
- Formula Base
- SC20 with elevated cristobalite content
- Primary Composition
- Powdered silica (quartz), cristobalite, gypsum (calcium sulfate) binder
- Recommended Mixing Ratio
- 38–40 mL water per 100 g powder
- Recommended Use
- Lost-wax casting of jewelry and fine art pieces
- Best Suited For
- White gold; also suitable for yellow gold, silver, and other metal alloys
- Package Size
- 100 lb
- Prop 65 Warning
- Contains crystalline silica — see Notes
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