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 | Beauty-Cast Gypsum Investment | Hi Temp Carbon-Free Investment | 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 | The proven standard for the Hygroscopic Technique. Also excellent for the High Heat Technique. | A special investment for non-precious and semi-precious alloys. HI-TEMP contains no carbon. Non-precious metal alloys require an investment specially | 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 - 75 g Package
144 - 50 g Package
24 - 50 g Package
11 kg (25 pounds) Carton | 144 - 90 g Package
144 - 60 g Package
6 Pack - 340 mL Bottles
6 Pack - 1 L Bottles
340 mL Bottle
1 L Bottle | 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 - 700 psi (5 MPa) | Wet - 1,500 psi (10 MPa) | Wet - 6,000 psi (42 MPa)
Dry - 6,500 psi (48 MPa) | Wet - 1,200 psi (9 MPa) |
| Working Time | 3 minutes | 3 minutes | 7 - 8 minutes | 2 minutes | 2 - 3 minutes |
| Set Time | 16 minutes | 14.5 minutes | Not Available | Not Available | 15 minutes |
| Material Type | Gypsum Bonded Investment | Gypsum Casting Investment | Carbon-Free Phosphate Bonded | Refractory Die Material | Gypsum Bonded Investment |
| Indication For Use | Low Fusing Crown and Bridge Alloys | Low Fusing Crown and Bridge Alloys | High Fusing Alloys | Refractory Investment - Direct Firing Ceramics | Low and High Fusing Precious Metals |
| Liquid / Powder Ratio | 30 mL / 100 g | 30 mL/100 g | 16 mL / 100 g | 22 mL / 100 g | 24 mL / 100 g |
| Setting Expansion | 0.5 % | 0.4 % | 0.7 % | 0.8 % | 0.25 % |
| Ready For Burnout | 30 minutes | 30 minutes | 60 minutes | Not Available | 30 Minutes |
| Hygroscopic Expansion | Not Available | 1.5 % | N / A | N / A | N / A |
| Thermal Expansion | 650º C (1,200º F) - 1.25 % | 480º C (900º F) - 0.55%
650º C (1,200º F) - 1.20% | 1.2 % | 500° C, 2nd firing - 0.65% | 700° C (1,300° F) - 0.60 % |
| Metal or Ringless Technique | Metal Only | Metal Only | Metal or Ringless | N / A | N / A |
| Get Info | Not Available | Not Available | Not Available | Not Available | Not Available |