Disinfection duration of alginate impression, when immersion method is used, should not exceed: (A) 10 min, (B) 20 min, (C) 5 min, (D) 30 min
Answer is A. Feedback 
The current protocol for disinfecting hydrocolloid impression is to use household bleach 1:10 dilution , iodophors or synthetic phenols. The time of immersion should not exceed 10min, when immersion method is used.