Is Aurelian's sunscreen physical or chemical?

The protective effect of sunscreen on ultraviolet rays mainly depends on the added sunscreen ingredients. In principle, sunscreen ingredients are divided into physical and chemical. Physical sunscreen components mainly rely on reflection to shield ultraviolet rays and achieve the purpose of sun protection. Chemical sunscreen ingredients can absorb ultraviolet rays, convert them into heat and then release them, thus reducing the damage to the skin. First of all, talk about physical sunscreen ingredients. At present, titanium dioxide and zinc oxide are mainly used in skin care products. They are fine particles that can reflect light, have a wide sunscreen spectrum and can protect UVA and UVB. Moreover, these two ingredients can "live in peace" with the skin and will not irritate the skin. Especially zinc oxide, even if it is used by dermatologists to treat eczema, dermatitis and other diseases, can also be applied to sensitive parts such as eyes, which is very suitable for children's shoes with sensitive skin. Apart from slightly blocking pores, I really found that physical sunscreen ingredients do harm to the skin. At the same time, physical sunscreen ingredients can only be made into oily ointment because of their own physical and chemical properties. This sunscreen is thick and sticky, and oily skin is not suitable for use.