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 | Soldering Investment | Beauty-Cast Gypsum Investment | Hi Temp Carbon-Free Investment | Polyvest Refractory Die Material | X-20 Chrome Phosphate Investment |
| Price | Inquire | Inquire | Inquire | Inquire | Inquire |
| Description | Multi-purpose SOLDERING INVESTMENT isideal for soldering all types of dental alloys, including chrome-cobalt. Its fine texture mixes readily with | 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 | A vastly improved casting investment for making chrome partial denture frameworks. For casting any chrome partial alloy. Refractory Cast is hard, |
| Quantity | 2 kg (4.5 pounds) Package
11 kg (25 pounds) Carton | 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 | 22 kg (50 pounds) Carton
50 - 400 g Packages
25 kg (55 pounds) Carton
6 Pack - 340 mL Bottles
6 Pack - 1 L Bottles
340 mL Bottle
1 L Bottle |
| Compressive Strength | Wet - 1,200 psi (9 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 - 2,500 psi (17 MPa) |
| Working Time | 2 - 3 minutes | 3 minutes | 7 - 8 minutes | 2 minutes | 4 - 5 minutes |
| Set Time | 15 minutes | 14.5 minutes | Not Available | Not Available | Not Available |
| Material Type | Gypsum Bonded Investment | Gypsum Casting Investment | Carbon-Free Phosphate Bonded | Refractory Die Material | Phosphate Bonded |
| Indication For Use | Low and High Fusing Precious Metals | Low Fusing Crown and Bridge Alloys | High Fusing Alloys | Refractory Investment - Direct Firing Ceramics | Casting Partials with Chromium Dental Alloys |
| Liquid / Powder Ratio | 24 mL / 100 g | 30 mL/100 g | 16 mL / 100 g | 22 mL / 100 g | 11 mL / 100 g |
| Setting Expansion | 0.25 % | 0.4 % | 0.7 % | 0.8 % | 0.2 % |
| Ready For Burnout | 30 Minutes | 30 minutes | 60 minutes | Not Available | 30 - 60 minutes |
| Hygroscopic Expansion | N / A | 1.5 % | N / A | N / A | N / A |
| Thermal Expansion | 700° C (1,300° F) - 0.60 % | 480º C (900º F) - 0.55%
650º C (1,200º F) - 1.20% | 1.2 % | 500° C, 2nd firing - 0.65% | 700 -- 1,000° C (1,300 -- 1,800° F) - 0.90 % |
| Metal or Ringless Technique | N / A | Metal Only | Metal or Ringless | N / A | Metal or Ringless |
| Get Info | Not Available | Not Available | Not Available | Not Available | Not Available |