Stone Casting Process

Preparation

• Gloves: Do not wear gloves initially.
• Materials Needed:
  • Stone
  • Mixing bowl
  • Alginate (negative impression)
  • Vibrator
  • Spatula
• Stone Measurement: Use one cup (one blue cup) of stone per model.

Steps for Mixing Stone

1. Initial Mixing (No Gloves):

   • Add water to stone slowly.
   • Stir gradually until all powder is incorporated.
   • Aim for a thick mix that doesn’t fall off the spatula.

2. Using the Vibrator:

   • Place the mix on a vibrator for a few seconds to eliminate air bubbles.
   • Start pouring from one end of the alginate mold.
   • Keep alginate against the vibrator and spatula in the air.
   • Continue until stone reaches the last tooth impression.
   • Ensure there are no bubbles visible.

3. Adding More Stone:

   • Add more stone in larger increments, filling in gaps.
   • Remove from vibrator once filled.

4. Building the Base:

   • Build up the remaining stone above tray level like a cupcake or ice cream.
   • Use all available stone to avoid waste.
   • Flip the mold gently and jiggle to set the base.

Finalizing

• Ensure the base is formed without air bubbles and the stone is fully set.