How To Make a Face Casting with Alja‑Safe® Crystalline Silica‑Free Alginate
Step 3: Applying Gypsum Bandages for a Support Shell
Salt is then added into warm tap water (80°F/ 27°C) to accelerate dry time of plaster bandage. Plaster bandages are dipped in water to activate. Excess water is squeezed out of the plaster bandages and then applied directly onto the alginate.
The edge of the support shell is created first around the perimeter of the alginate mold. Plaster bandages will 'meld' into itself. The entire alginate surface area needs to be covered by the plaster bandages to ensure proper support.
The exterior of the plaster support shell is smoothed out while the bandages are still moist. A small piece of plaster bandage is used to create nose support. The plaster bandage support shell is now completed.
