Cosmetics Formulation Development

Hello, if you want to use SPF Protect Ultra™ II at 15% according to data Report will get approx. SPF50, PA++. If you want to adjust SPF50, PA+++ add + one by using Zinc Oxide 35nm Liquid I don't know how many % I have to add, or which one can I use to help + increase it? Thank you.

Hello, try Zinc Oxide 35nm Liquid 5% if using SPF Protect Ultra II In the formula, SPF can be measured. Free that the company lab recommends after completing the recipe Please send a sample of the formula to the measurement lab. In order to know the actual value. In addition, the measurement report document can be used. Those who leave the company lab can also go to notify the FDA.