Hello
Titanium Dioxide 15nm Liquid 1% gives an SPF of approximately 2.0.
Zinc Oxide 35nm Liquid 1% gives SPF about 1.0- 1.5 [
Zinc Oxide focuses more on PA or UVA protection. SPF or UVB protection] Use both together or in combination with
สารกันแดด will be able to enhance the action and make 1% of each
ส่วนผสมกันแดด gives a higher value, therefore calculating SPF/PA is not easy. because when used together with
สารกันแดด Other SPF/PA values will vary with synergy or supplementation to work.