Which of the following is true about Agar hydrocolloid impression material ?
Correct answer: C. Liquefies between 71 - 100°C
- A. Facilitates fabrication of metal dyes
- B. Solidfies between 50 - 70°C
- C. Liquefies between 71 - 100°C
- D. Cannot register fine surface details
Explanation
Agar is a reversible hydrocolloid that liquefies when heated, usually within about 71 to 100°C, and gels on cooling. It can record fine details, so the statements denying detail reproduction are false.
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