Broad Spectrum SPF ~25, PFA (PPD) ~32 Sunscreen Cream

Preparation:

In secondary vessel, combine A and start mixing. Slowly add B with continued mixing. Heat this oil phase to 80–90°C, then add phase C ingredients in order. When A–C is homogeneous, add D and mix until totally dissolved. To the main vessel, add E and start mixing. Add F and, when dissolved, add G. When fully incorporated, start heating to 80°C and add premix of H. When oil and water phases are uniform and at the defined temperatures, add the oil phase (A–D) to the water phase (E–H) with strong mixing without aeration. Start homogenizing intensively and start cooling. When the batch is at 45°C, add I and keep homogenizing intensively. Add J, homogenize until uniform, then resume sweep mixing. Add deionized water as needed to correct for evaporative losses. Continue mixing and cooling until a smooth, homogeneous lotion results and product is at the desired filling temperature. Perform final quality assurance checks