1. Soak original stone model in rubber bowl filled with water for 10 minutes prior to mixing alginate.
2. Measure model in appropriate tray
3. Mix alginate
4. Load an impression tray
5. Place on the model into the loaded tray
6. Remove the model after three or four minutes, depending on the alginate
7. Mix your stone, pour the impression. Let it set for 15 to 20 minutes.
8. For duplication of lower, use upper tray to simplify process.