Which of the following is used as surface hardener in Impression mater – McqOptions

MCQOPTIONS

1.	Which of the following is used as surface hardener in Impression material ?
A.	2% Potassium sulfate
B.	0.2% Potassium sulfate
C.	2% sodium sulfate
D.	4% Potassium sulfate
Answer» B. 0.2% Potassium sulfate

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