What is the PA value of sunscreen? How well does it block UVA rays?

What is the PA value of sunscreen? When girls buy sunscreen, they should have found that many sunscreens are marked with the word PA. So what does this PA mean? Let's learn about it together below~

What is the PA value of sunscreen?

The PA value of sunscreen refers to the sunscreen's ability to protect against ultraviolet UVA. Ultraviolet UVA can enter the dermis of the skin and is cumulative and irreversible to the skin. If it accumulates for a long time, it is likely to cause dermatitis or skin pigmentation, so girls are very important when choosing sunscreen.

What does sunscreen pa+++ mean?

Girls should have also discovered that there is a + sign after sunscreen PA. This + sign actually indicates how long the sunscreen protects against ultraviolet UVA. The more + signs there are, the longer the sunscreen protects against ultraviolet UVA. For example, PA+ means that the sunscreen can delay the skin's tanning time by 2-4 times, PA++ means that it can delay the skin's tanning time by 4-8 times, and PA+++ means that it can extend the skin's tanning time by more than 8 times, and so on.