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 | Beauty-Cast Gypsum Investment | FastFire 15 Phosphate Investment | Polyvest Refractory Die Material | PowerCast Phosphate Investment | ResinVest |
| Price | Inquire | Inquire | Inquire | Inquire | Inquire |
| Description | The proven standard for the Hygroscopic Technique. Also excellent for the High Heat Technique. | 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 | POLYVEST Refractory Die Material is formulated with a coefficient of thermal expansion to closely match today's newer porcelains. With its controlled | A carbon-free, fine-grain phosphate bonded investment for casting crown and bridge and ceramic alloys. This versatile all-purpose investment has been | 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 - 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 | 24 - 60 g Package
6 Pack - 340 mL Bottles
6 Pack - 1 L Bottles
340 mL Bottle
1 L Bottle | 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 | 100 g Package; 55 lbs. Carton |
| Compressive Strength | Wet - 700 psi (5 MPa) | Wet - 500 psi (3.4 MPa) | Wet - 6,000 psi (42 MPa)
Dry - 6,500 psi (48 MPa) | Wet - 700 psi (5 MPa) | 1,350 psi (9.2 MPa) |
| Working Time | 3 minutes | 7 - 9 minutes | 2 minutes | 8 - 9 minutes | 6 to 8 Minutes |
| Set Time | 14.5 minutes | Not Available | Not Available | Not Available | 30 Minutes Minimum |
| Material Type | Gypsum Casting Investment | Fine Grain Phosphate | Refractory Die Material | Carbon-free, Fine-grain Phosphate-bonded Investment | Phosphate Investment |
| Indication For Use | Low Fusing Crown and Bridge Alloys | Universal Phosphate Investment for All Crown and Bridge Alloys | Refractory Investment - Direct Firing Ceramics | Casting Crown and Bridge and Ceramic Alloys | Burning out milled or printed resin patterns |
| Liquid / Powder Ratio | 30 mL/100 g | 27 mL / 100 g | 22 mL / 100 g | 23 mL / 100 g | 22 ml/100 g |
| Setting Expansion | 0.4 % | 1 % | 0.8 % | 0.8 % | 1.6 Percent |
| Ready For Burnout | 30 minutes | 15 minutes | Not Available | 45 minutes | Yes |
| Hygroscopic Expansion | 1.5 % | N / A | N / A | N / A | Not Available |
| Thermal Expansion | 480º C (900º F) - 0.55%
650º C (1,200º F) - 1.20% | 1.0 % | 500° C, 2nd firing - 0.65% | 1 % | 0.65 Percent |
| Metal or Ringless Technique | Metal Only | Metal or Ringless | N / A | Metal or Ringless | Both |
| Get Info | Not Available | Not Available | Not Available | Not Available | Not Available |