Dental ZnPO4 setting time is 4-7 min. All of the following methods are employed to prolong its setting time except: A Addition of drop of distilled water B Prolong spatulation time C Small increment of addition of powder to liquid D Mixing on cooled glass slab 💡 Explanation ZnPO4 setting time is 4-7 min. All of the following methods are employed to prolong its setting time except: ✓ Correct Answer: A. Addition of drop of distilled water