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 | Cera-Fina Carbon-Free Fine Grained Investment | FastFire 15 Phosphate Investment | ResinVest | V.H.T. Refractory 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 | CERA-FINA is a carbon-free phosphate investment developed for professionals who demand a more finely grained investment. It is designed for use with | FASTFIRE 15 is a fine grain phosphate investment which requires only a 15 minute benchset before placing molds into a hot oven for rapid burnout. It | Designed for burning out printed or milled resin patterns for crowns, bridges, or frameworks, ResinVest is a fiber-reinforced material that resists | 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 | 144 - 50 g Package | 9 kg (20 pounds) Carton
24 - 90 g Package
144 - 60 g Package
144 - 90 g Package
6 Pack - 340 mL Bottles
6 Pack - 1 L Bottles
340 mL Bottle
1 L Bottle | 100 - 90 g Package
150 - 60 g Package
25 - 90 g Package
25 - 60 g Package
340 mL Bottle
1 L Bottle
6 Pack - 340 mL Bottles
6 Pack - 1 L Bottles
9 kg (2 pounds) Carton | 100 g Package; 55 lbs. Carton | 24 - 60 g Package
6 Pack - 340 mL Bottles
6 Pack - 1 L Bottles
340 mL Bottle
1 L Bottle |
| Compressive Strength | Wet - 700 psi (5 MPa) | Wet - 600 psi (4 MPa) | Wet - 500 psi (3.4 MPa) | 1,350 psi (9.2 MPa) | Wet - 2,500 psi (17 MPa)
Dry - 4,800 psi (34 MPa) |
| Working Time | 3 minutes | 8 - 10 minutes | 7 - 9 minutes | 6 to 8 Minutes | 4 - 5 minutes |
| Set Time | 16 minutes | Not Available | Not Available | 30 Minutes Minimum | Not Available |
| Material Type | Gypsum Bonded Investment | Carbon-free Phosphate Bonded Investment | Fine Grain Phosphate | Phosphate Investment | Refractory Die Material |
| Indication For Use | Low Fusing Crown and Bridge Alloys | High Fusing Alloys | Universal Phosphate Investment for All Crown and Bridge Alloys | Burning out milled or printed resin patterns | Direct Firing Ceramics |
| Liquid / Powder Ratio | 30 mL / 100 g | 24 mL / 100 g | 27 mL / 100 g | 22 ml/100 g | 19 mL / 100 g |
| Setting Expansion | 0.5 % | 0.25 % | 1 % | 1.6 Percent | 0.3 % |
| Ready For Burnout | 30 minutes | 90 minutes | 15 minutes | Yes | Not Available |
| Hygroscopic Expansion | Not Available | N / A | N / A | Not Available | N / A |
| Thermal Expansion | 650º C (1,200º F) - 1.25 % | 1.3 % | 1.0 % | 0.65 Percent | 500° C, 2nd Firing - 0.8 % |
| Metal or Ringless Technique | Metal Only | Metal or Ringless | Metal or Ringless | Both | N / A |
| Get Info | Not Available | Not Available | Not Available | Not Available | Not Available |