The setting time of irreversible hydrocolloids can be decreased by_____________?
Correct answer: D. Raising the temperature of water used for maxing
- A. None of the above
- B. Using excess water for maxing
- C. Lowering the temperature of water used for mixing
- D. Raising the temperature of water used for maxing
Explanation
Warmer mixing water accelerates the chemical reaction of alginate and therefore shortens its setting time. Cooler water extends working and setting time, while excess water generally weakens and retards the set.
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