Sunscreen Formulation with Titanium Dioxide and Zinc Oxide

To formulate sunscreen using Titanium Dioxide 15nm Liquid and Zinc Oxide 35nm Liquid, here are some guidelines based on product information:

For SPF 50

Based on an example formula provided, to achieve an SPF of around 50 (specifically tested at 51.06 PA++), you can use:

• Titanium Dioxide 15nm Liquid: 25%
• Zinc Oxide 35nm Liquid: 15%

Using both ingredients together provides broad-spectrum protection covering both UVA and UVB wavelengths.

For SPF 30

There is no specific tested formula available for SPF 30 using these exact products. However, based on guidance, you can reduce the amount of Titanium Dioxide 15nm Liquid used for SPF 50 by approximately 40-50%.

• If using 25% for SPF 50, reducing by 40-50% would mean using Titanium Dioxide 15nm Liquid in the range of 12.5% to 15%.

While specific percentages for Zinc Oxide 35nm Liquid for SPF 30 are not provided, it is generally recommended to use it alongside Titanium Dioxide for comprehensive UVA/UVB protection. You might consider adjusting its percentage proportionally or maintaining a certain level to ensure adequate UVA protection, keeping within its recommended usage rate of 5-40%.