Scoop the alginate into the dental tray. Don't overfill it as you don't want to make the victim gag on excess. Since we're only doing fangs and not a full set fill the whole tray but don't overload where the back teeth will go. Fill up to the rim of the tray to include the fronts and to about the 4th or 5th tooth. Make sure there's enough in the tray to cover the front gums as well. I usually mix my alginate about 1 ½ minutes, which leave the person with only a minute or so to get it situated before it sets up.
