Complete information related to the steps in the sequence of mixing either plaster
of Paris or artificial stone.
a. Obtain a clean, dry ______________ bowl.
b. Obtain a ________________ spatula.
_____________ is measured and poured into the bowl.
d. Powder is _______________ into the water.
e. All the powder from the ___________ of the bowl must be included in the mix.
Avoid trapping ______________________
Describe the process of spatulation used in mixing gypsum products.
a. With the spatula, stir the mix for _____ to _____ seconds.
b. Use a _____________ or _____________ motion.
_________________ the mix will entrap air bubbles and weaken the cast.
d. ____________ the mixed material in the bowl to remove trapped air bubbles.
Initial setting time for plaster of Paris is:
a. 5 to 10 minutes.
b. 8 to 10 minutes.
Following the initial setting time, __________ becomes hard enough to hold for
a. Plaster of Paris.
b. Artificial stone.