Choosing and Incorporating Zinc Oxide in Sunscreen Lotion

Choosing and Incorporating Zinc Oxide in Sunscreen Lotion

Regarding the use of Zinc Oxide in skin lotion for sun protection, and addressing the issue of traditional powder clumping, both products you mentioned, Zinc Oxide 35nm Liquid and Zinc Oxide (40nm, Triethoxycaprylylsilane Coated), are developed to disperse more easily in formulations.

• Zinc Oxide 35nm Liquid: This is a liquid type that has undergone a special process to fully disperse 35nm Zinc Oxide powder in an oil/silicone base. It is very easy to use; you can add it directly to the oil or silicone phase of your formula and stir until combined. It is particularly suitable for Water-in-Oil Emulsion formulas, which offer good water resistance and higher SPF values compared to Oil-in-Water formulas.

• Zinc Oxide (40nm, Triethoxycaprylylsilane Coated): This is a powder type, but it is surface-treated with Triethoxycaprylylsilane, which helps the powder disperse easily and completely in the oil or silicone phase of the formula compared to uncoated Zinc Oxide powder. It is suitable for use as a Physical Sunscreen and also works well in makeup products like foundations or pressed powders.

In Summary:

If your skin lotion is a Water-in-Oil Emulsion or primarily contains oil/silicone components, Zinc Oxide 35nm Liquid will be the easiest to use as it is a pre-dispersed liquid that can be added and mixed into the formula immediately.

If your formula is a different type or you prefer a powder form that disperses easily in oil/silicone, Zinc Oxide (40nm, Triethoxycaprylylsilane Coated) is also a good option. You will need to disperse it in the oil or silicone phase before incorporating it into the main formula.

For complete Broad-spectrum protection covering both UVA and UVB rays, it is recommended to use Zinc Oxide together with Titanium Dioxide.