Question 175 · LDEK · Dental laboratory technology
Liquid sodium-alginate separating medium is used to separate:
- A. alginate impression from gypsum.
- B. silicone impression from epoxy resin.
- C. working cast from wax pattern.
- D. gypsum from acrylic resin.
- E. investment material from metal alloy.
Hint
Sodium alginate reacts with calcium in plaster to form a film; think which two materials meet in a denture flask.
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