Impression plaster containing potato starch is called______________?
Correct answer: B. Soluble plaster
- A. Plaster of paris
- B. Soluble plaster
- C. Anti - expansion solution
- D. Die stones
Explanation
Potato starch is added to impression plaster to make it soluble, allowing the impression to be removed more easily from the cast. This product is therefore called soluble plaster, not ordinary plaster of Paris.
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