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 | Polyvest Refractory Die Material | Beauty-Cast Gypsum Investment | Cristobalite Investment Material | PowerCast Phosphate Investment | V.H.T. Refractory Investment |
| Price | Inquire | Inquire | Inquire | Inquire | Inquire |
| Description | POLYVEST Refractory Die Material is formulated with a coefficient of thermal expansion to closely match today's newer porcelains. With its controlled | The proven standard for the Hygroscopic Technique. Also excellent for the High Heat Technique. | The principal ingredient, CRISTOBALITE, gives high thermal expansion, even at comparatively low temperatures. It is possible to use the same creamy | A carbon-free, fine-grain phosphate bonded investment for casting crown and bridge and ceramic alloys. This versatile all-purpose investment has been | One of the most useful and efficient laboratory materials available today, V.H.T. is an extremely fine-grained phosphate investment with an ample |
| Quantity | 24 - 60 g Package
6 Pack - 340 mL Bottles
6 Pack - 1 L Bottles
340 mL Bottle
1 L Bottle | 144 - 75 g Package
144 - 50 g Package
24 - 50 g Package
11 kg (25 pounds) Carton | 144 - 50 g Package | 9 kg (20 pounds) Carton
150 - 60 g Package
100 - 90 g Package
6 Pack - 340 mL Bottles
6 Pack - 1L 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 |
| Compressive Strength | Wet - 6,000 psi (42 MPa)
Dry - 6,500 psi (48 MPa) | Wet - 700 psi (5 MPa) | Wet - 700 psi (5 MPa) | Wet - 700 psi (5 MPa) | Wet - 2,500 psi (17 MPa)
Dry - 4,800 psi (34 MPa) |
| Working Time | 2 minutes | 3 minutes | 3 minutes | 8 - 9 minutes | 4 - 5 minutes |
| Set Time | Not Available | 14.5 minutes | 16 minutes | Not Available | Not Available |
| Material Type | Refractory Die Material | Gypsum Casting Investment | Gypsum Bonded Investment | Carbon-free, Fine-grain Phosphate-bonded Investment | Refractory Die Material |
| Indication For Use | Refractory Investment - Direct Firing Ceramics | Low Fusing Crown and Bridge Alloys | Low Fusing Crown and Bridge Alloys | Casting Crown and Bridge and Ceramic Alloys | Direct Firing Ceramics |
| Liquid / Powder Ratio | 22 mL / 100 g | 30 mL/100 g | 30 mL / 100 g | 23 mL / 100 g | 19 mL / 100 g |
| Setting Expansion | 0.8 % | 0.4 % | 0.5 % | 0.8 % | 0.3 % |
| Ready For Burnout | Not Available | 30 minutes | 30 minutes | 45 minutes | Not Available |
| Hygroscopic Expansion | N / A | 1.5 % | Not Available | N / A | N / A |
| Thermal Expansion | 500° C, 2nd firing - 0.65% | 480º C (900º F) - 0.55%
650º C (1,200º F) - 1.20% | 650º C (1,200º F) - 1.25 % | 1 % | 500° C, 2nd Firing - 0.8 % |
| Metal or Ringless Technique | N / A | Metal Only | Metal Only | Metal or Ringless | N / A |
| Get Info | Not Available | Not Available | Not Available | Not Available | Not Available |