Dental investment materials are used to encase the wax designed for the lost wax casting technique. These materials are usually available as a powder that is mixed with water and then used to encase the wax design. These materials solidify and can withstand the heat of the casting furnace to hold the precise shape left behind when the wax is burned out. Different gypsums are designed for use with different dental alloys or other materials, so be sure to select the proper gypsum for the case at hand.
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| Company | Whip Mix Corporation | Whip Mix Corporation | Whip Mix Corporation | Whip Mix Corporation | Whip Mix Corporation |
| Item | Cristobalite Investment Material | Hi Temp Carbon-Free Investment | Novocast Investment Material | Polyvest Refractory Die Material | Soldering Investment |
| Price | Inquire | Inquire | Inquire | Inquire | Inquire |
| Description | The principal ingredient, CRISTOBALITE, gives high thermal expansion, even at comparatively low temperatures. It is possible to use the same creamy | A special investment for non-precious and semi-precious alloys. HI-TEMP contains no carbon. Non-precious metal alloys require an investment specially | NOVOCAST is an advanced inlay investment that provides increased accuracy for casting conventional gold alloys at a mold temperature of 650 degrees C | POLYVEST Refractory Die Material is formulated with a coefficient of thermal expansion to closely match today's newer porcelains. With its controlled | Multi-purpose SOLDERING INVESTMENT isideal for soldering all types of dental alloys, including chrome-cobalt. Its fine texture mixes readily with |
| Quantity | 144 - 50 g Package | 144 - 90 g Package
144 - 60 g Package
6 Pack - 340 mL Bottles
6 Pack - 1 L Bottles
340 mL Bottle
1 L Bottle | 9 kg (20 pounds) Carton
24 - 50 g Package
24 - 75 g Package
144 - 50 g Package
144 - 75 g Package | 24 - 60 g Package
6 Pack - 340 mL Bottles
6 Pack - 1 L Bottles
340 mL Bottle
1 L Bottle | 2 kg (4.5 pounds) Package
11 kg (25 pounds) Carton |
| Compressive Strength | Wet - 700 psi (5 MPa) | Wet - 1,500 psi (10 MPa) | Wet - 950 psi (7 MPa) | Wet - 6,000 psi (42 MPa)
Dry - 6,500 psi (48 MPa) | Wet - 1,200 psi (9 MPa) |
| Working Time | 3 minutes | 7 - 8 minutes | 3 minutes | 2 minutes | 2 - 3 minutes |
| Set Time | 16 minutes | Not Available | 15 minutes | Not Available | 15 minutes |
| Material Type | Gypsum Bonded Investment | Carbon-Free Phosphate Bonded | Gypsum Bonded Investment | Refractory Die Material | Gypsum Bonded Investment |
| Indication For Use | Low Fusing Crown and Bridge Alloys | High Fusing Alloys | Low Fusing Crown and Bridge Alloys | Refractory Investment - Direct Firing Ceramics | Low and High Fusing Precious Metals |
| Liquid / Powder Ratio | 30 mL / 100 g | 16 mL / 100 g | 34 mL / 100 g | 22 mL / 100 g | 24 mL / 100 g |
| Setting Expansion | 0.5 % | 0.7 % | 0.45 % | 0.8 % | 0.25 % |
| Ready For Burnout | 30 minutes | 60 minutes | 30 minutes | Not Available | 30 Minutes |
| Hygroscopic Expansion | Not Available | N / A | N / A | N / A | N / A |
| Thermal Expansion | 650º C (1,200º F) - 1.25 % | 1.2 % | 650° C - 1.20 % | 500° C, 2nd firing - 0.65% | 700° C (1,300° F) - 0.60 % |
| Metal or Ringless Technique | Metal Only | Metal or Ringless | Metal Only | N / A | N / A |
| Get Info | Not Available | Not Available | Not Available | Not Available | Not Available |