How to use sunscreen correctly to achieve the best effect?

How to use sunscreen correctly and how to achieve the best effect? Incorrect usage may cause sunscreen to have the opposite effect, so the use of sunscreen must be taken very seriously. Let’s take a look.

The correct way to use sunscreen

You have to be willing to use a certain amount. The generally recommended amount is the size of a one-yuan RMB coin, but if you are going outdoors, it is best to apply a few more layers. Apply sunscreen at all times and in all places, whether it is sunny or cloudy, indoors or outdoors, at the seaside or in the city. Please remember that ultraviolet rays are everywhere, so please always remember to apply sunscreen. You need to remove makeup after using sunscreen, especially physical sunscreen and hybrid sunscreen.

The role of sun protection

Sun protection mainly protects against two things: UVB sunburn and UVA tanning. The main function of sunscreen products is to protect the skin from damage caused by UVA and UVB rays. UVB is medium-wave ultraviolet light, which can cause sunburn and redness of the skin in a short period of time. UVB is particularly strong in the summer and in the afternoon.

What does SPF and PA mean?

SPF is a symbol of protection against UVB, while PA is a symbol of protection against UVA. The larger the SPF value, the longer it delays sunburn: PA corresponds to the protection against UVA, and the PA+ value represents the effective protection time .

Physical sunscreen and chemical sunscreen

Physical sunscreen uses titanium dioxide (TiO2) and zinc oxide (ZnO) to form a protective film on the skin surface to reflect ultraviolet rays, thereby achieving a sunscreen effect. It is a broad-spectrum sunscreen. Chemical sunscreen products mainly contain chemical absorbent ingredients that absorb the energy of ultraviolet rays and then re-release them in the form of heat energy or harmless visible light to achieve the effect of UV protection.