Plaster mix____________?
Correct answer: A. All of the above
- A. All of the above
- B. 2% potassium sulphate is accelerator
- C. Citrates are retarders
- D. Rapid spatulation results in decreased setting time
Explanation
Rapid spatulation increases the number of crystallisation nuclei and shortens setting time. Potassium sulphate accelerates gypsum setting, while citrate salts retard it, so all three statements are correct.
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