To formulate the skin yogurt formulation,
first heat parts A and B in separate vessels to 70°C, with mixing. With both phas- es uniform, slowly add part B to part A using moderate agita- tion. When the batch is uniform, gradually cool to 55°C with continued mixing. At 55°C, add part C (Carbopol Aqua CC polymer). As gradual cooling and mixing continues, add part D (glycolic acid) and pre-mixed part E and adjust pH to 3.5-4.0 with part F (triethanolamine). When the batch reaches 45-50°C, add part G ingredients one at a time with mixing. Continue cooling and mixing until completion at 35-40°C.