Physical Sunscreen Formulation: Cold Process, Isopentyldiol, and TaraGel

Based on the staff's response regarding your physical sunscreen formulation:

1. Using Light Lotion Maker without heat: Yes, Light Lotion Maker (4%) can be used to emulsify this formula without heat. The recommended method is to mix the oil phase well, then mix the water phase, and gradually add the oil phase to the water phase while mixing.
2. Isopentyldiol in the oil phase: Yes, Isopentyldiol should be considered part of the oil phase. Including it would result in a total oil phase percentage of 45%, which is considered too high and increases the risk of formula separation. It is recommended to reduce the oil phase percentage.
3. Using TaraGel with Light Lotion Maker: Yes, TaraGel can be used with Light Lotion Maker to increase viscosity and improve formula stability. Add TaraGel after the cream is formed and mix well into the formula.