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 | Cera-Fina Carbon-Free Fine Grained Investment | Ceramigold Investment with Carbon | X-20 Chrome Phosphate 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. | CERA-FINA is a carbon-free phosphate investment developed for professionals who demand a more finely grained investment. It is designed for use with | This phosphate investment contains carbon for bright, gold-colored castings. Expansion can be controlled to fit your needs -- yet technic is easy to | A vastly improved casting investment for making chrome partial denture frameworks. For casting any chrome partial alloy. Refractory Cast is hard, |
| 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 | 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 | 144 - 90 g Package
144 - 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 - 6,000 psi (42 MPa)
Dry - 6,500 psi (48 MPa) | Wet - 700 psi (5 MPa) | Wet - 600 psi (4 MPa) | Wet - 1,500 psi (10 MPa) | Wet - 2,500 psi (17 MPa) |
| Working Time | 2 minutes | 3 minutes | 8 - 10 minutes | 6 - 7 minutes | 4 - 5 minutes |
| Set Time | Not Available | 14.5 minutes | Not Available | Not Available | Not Available |
| Material Type | Refractory Die Material | Gypsum Casting Investment | Carbon-free Phosphate Bonded Investment | Phosphate Bonded Investment | Phosphate Bonded |
| Indication For Use | Refractory Investment - Direct Firing Ceramics | Low Fusing Crown and Bridge Alloys | High Fusing Alloys | Crown and Bridge and Ceramic Gold Alloys | Casting Partials with Chromium Dental Alloys |
| Liquid / Powder Ratio | 22 mL / 100 g | 30 mL/100 g | 24 mL / 100 g | 16 mL /100 g | 11 mL / 100 g |
| Setting Expansion | 0.8 % | 0.4 % | 0.25 % | 0.7 % | 0.2 % |
| Ready For Burnout | Not Available | 30 minutes | 90 minutes | 60 minutes | 30 - 60 minutes |
| Hygroscopic Expansion | N / A | 1.5 % | N / A | 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% | 1.3 % | 1.2 % | 700 -- 1,000° C (1,300 -- 1,800° F) - 0.90 % |
| Metal or Ringless Technique | N / A | Metal Only | Metal or Ringless | Metal or Ringless | Metal or Ringless |
| Get Info | Not Available | Not Available | Not Available | Not Available | Not Available |