The best amount of PA value to choose for sunscreen

Between 30 and 50, and then the lead is too high, and it's best to make up every four hours.

If it is summer and the place of living is close to unsheltered areas, you should choose SPF30, PA++ is fine.

But to go to the beach for swimming or vacation, you should choose SPF50, PA++ PA+++ is appropriate. A full-body repair should also be done in the evening.

Daily home life should also protect from the sun, choose SPF15-20, PA++ sunscreen. Stick to an hourly spray of moisturizing spray.

SPF stands for** the time factor for blocking UV rays. Assuming that under normal circumstances without sunscreen, it only takes 20 minutes for our ** to be tanned, if we use SPF15 products, at this time, 20 15 = 300 (minutes), in this case, we ** will be red after 300 minutes.

If the SPF is followed by a number of 8-20, this sunscreen is suitable for daily use, and if the SPF is followed by a number of 20-50, then it can be used outdoors.

The PA of a sunscreen product indicates a multiple of the time it takes to delay the tanning of the skin. The more you add up, the more you can prevent tanning.

PA+: Delay the tanning time by 2-4 times, and daily use of sunscreen is sufficient.

PA++: Delay the tanning time by 4-8 times, if you want to choose travel or outdoor sports, choose PA++.

PA+++ Delay the tanning time by more than 8 times, this sunscreen is mainly used when you are sunbathing.

Do you really know about sun protection? What exactly does PA and SPF mean? If I don't know, the sunscreen is white.

SPF protects against UVB rays and prevents sunburn, while PA protects against UVA and prevents tanning. UVA is the biggest killer of your skin. It is best to see if there is an ingredient in the product that is a UV absorber, "wheat filter", which can effectively form a protective net to filter all kinds of ultraviolet radiation.

The most vulnerable to ** is the sun exposure in normal life. Let's talk about how to choose the SPF value and PA value of sunscreen? Take a look below.

01 Sun Protection Factor (SPF) refers to the SPF sun protection factor, which is an indicator that measures the ability of sunscreen to protect UVB from UVB damage in the sun, indicating the sunscreen effect that sunscreen products can play.

02 The PA value is a measure of UVA protection for sunscreen products. Introduce a minimum amount of continuous blackening to test the UVA protection capability. PA indicates that the product is able to protect against UVA rays, which is the ability to prevent tanning.

03 PA+ stands for Effectiveness, PA++ stands for Very Effective, Pa++ stands for Very Effective, and the more + symbols, the stronger the ability of the product to protect the sunscreen.

04 When the sun is weak and the exposure time is short: clean first**; use of lotion; If it is**dry, apply a little lotion; Wipe off sunscreen around SPF15. When you have a lot of sun exposure and long exposures, you should use a sunscreen with SPF 15 or higher and apply sunscreen every two hours, in addition to the steps above.

SPF is the sun protection index, or sun protection factor, which mainly refers to the protection index of the product against UVB rays, the higher the SPF value, the stronger the effect of UVB protection.

Each unit of the SPF value represents the ability to stay in sunlight for 15 minutes without UVB damage.

For example, if you will have erythema after 15 minutes in the sun, after using a sunscreen with a spa of 20, the time for erythema can be extended to 15*20=300 minutes, that is, a face that would have been red in 15 minutes can be protected by this bottle of sunscreen for 5 hours.

PA is the tanning index, which mainly refers to the protection index of the product against long-wave ultraviolet rays, and the "+" indicates the product's defense ability. "The more + signs, the greater the value of PA, and the stronger the protection against UVA rays.

Specifically, PA+ means that it can delay the tanning time of the skin by 2-4 times, PA++ means that it can delay the time of 4-8 times, and PA+++ means that it can delay the time of tanning by more than 8 times.

A stool of stupid people SPF15 25 is more suitable, sensitive people SPF is more suitable at 12 20, people who are easy to tan can choose SPF20 or so products, generally people who often play outdoors SPF should be accompanied by jujube socks more than 30, the higher the SPF index, the better the sunscreen effect.

I think the most I think SPF 15 20 or PA index to three is very good; Because this index is a very suitable stage for the skin, and it can effectively prevent the skin from being tanned and enhance the skin's ability to withstand sunlight. Reputation.

Daily sun protection should reach 30pa, which can have a very good effect, and it is also very suitable.

Personally, I think that SP F three + PA50 or so is better, this sunscreen index is suitable for most people to shout Liang Zhen Zheng rough, if it is too low, the key beam, can not play the role of sunscreen.