I formulated an o/w cream, and I did the stability tests, and it is stable, and I wanted from the same formula to reduce 4% of the water and to put niacinamide instead, so there the cream certainly has a very good texture but testing it with centrifugation at 3500 rpm for 30 min then there is a separation. can someone guide me? I tried two formulation methods 1: dilute niacinamide in the water of the aqueous phase and emulsify by controlling the temperature (not exceeding 75°C) and the 2nd: add niacinamide to the cold phase but always separation of the emulsion. what is wrong here?
👉i used stearic acid 2%
emulagde 1000 ni 4 % CUTINA GMS 2% USING high shear 30 till 65°C then low shear till 45°C checking ph 5.6
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