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 |
| Item | Beauty-Cast Gypsum Investment | ResinVest |
| Price | Inquire | Inquire |
| Description | The proven standard for the Hygroscopic Technique. Also excellent for the High Heat Technique. | Designed for burning out printed or milled resin patterns for crowns, bridges, or frameworks, ResinVest is a fiber-reinforced material that resists |
| Quantity | 144 - 75 g Package
144 - 50 g Package
24 - 50 g Package
11 kg (25 pounds) Carton | 100 g Package; 55 lbs. Carton |
| Compressive Strength | Wet - 700 psi (5 MPa) | 1,350 psi (9.2 MPa) |
| Working Time | 3 minutes | 6 to 8 Minutes |
| Set Time | 14.5 minutes | 30 Minutes Minimum |
| Material Type | Gypsum Casting Investment | Phosphate Investment |
| Indication For Use | Low Fusing Crown and Bridge Alloys | Burning out milled or printed resin patterns |
| Liquid / Powder Ratio | 30 mL/100 g | 22 ml/100 g |
| Setting Expansion | 0.4 % | 1.6 Percent |
| Ready For Burnout | 30 minutes | Yes |
| Hygroscopic Expansion | 1.5 % | Not Available |
| Thermal Expansion | 480º C (900º F) - 0.55%
650º C (1,200º F) - 1.20% | 0.65 Percent |
| Metal or Ringless Technique | Metal Only | Both |
| Get Info | Not Available | Not Available |