The hot summer is coming again,Remember to wear sunscreen before you go out,I'm afraid I'll become a panda's hand if I'm not careful Panda leg,Especially the beautiful girls.With the improvement of people's awareness of skin care,Sunscreen is not just to protect yourself from tanning and sunburn,It is also used as daily maintenance products,It can delay skin aging.

On the label of sunscreen products,All markedSPF PAvalue,This value can be large or small.recently,The State Food and Drug Administration issued the management requirements for sunscreen effect labels,SPFThe maximum value of the dimension is changed from the original valueSPF30+,Adjust toSPF50+ PAThe maximum value of the dimension is changed from the original valuePA+++,Adjust toPA++++.

thisSPF PAIs the value high or low First of all, let's see what this is.

The skin turns red after the sun,Medically known as erythroplakia ,This is the slightest reaction of the skin to the sun.Minimum erythema dose,It is the shortest sun exposure time for skin erythema.After using sunscreen products,The minimum erythema dose on the skin will increase,Then the sunscreen factor of the sunscreen productSPFValue is

SPF=Minimum erythema dose After using sunscreen products /Minimum erythema dose Before using sunscreen

such as,If you don't smear anything,Exposed to the sun10Sunburn in minutes,applySPF15After sunscreen,Just need10×15=150It takes minutes to get sunburned.

in other words,SPFValue is a multiple of sunburn time.

thatPFAWhat's the value

Skin in ultraviolet lightUVAThe shortest irradiation time required to produce slight blackening under the irradiation of is called the minimum continuous blackening amount MPPD .After using sunscreen products,The time of blackening will increase,So sunscreen factorPFAValue is

PFA=Minimum continuous blackening After using sunscreen products /Minimum continuous blackening Before using sunscreen

WhenPFAValue is2～3Time,Identified asPA+ WhenPFAValue is4～7Time,Identified asPA++ WhenPFAValue is8～15Time,Identified asPA+++ WhenPFAValue is greater than or equal to16Time,Identified asPA++++.

such as,If you don't paint anything,Exposed to the sun10Tanning in minutes,applyPA+After sunscreen,Just need20-30Minutes to tan.

understandSPF PAAfter the meaning of value,We know,SPF PAThe higher the value,The longer it takes to prevent sunburn and tanning,However, products with high SPF often contain a large number of physical or chemical sunscreen agents,It is more irritating to the skin,Easy to block pores,Even acne and acne.Small partners should make their own travel plans,Choose sunscreen products with appropriate index.

If you work indoors,Not much going out,Then useSPF20following,PA+Sunscreen products

If your job requires traveling outdoors or on holidays,availableSPF20～SPF30,PA++Sunscreen products

If you are traveling to a beach or tropical area,Then you should chooseSPF30～SPF50+, PA+++～PA++++Our sunscreen products.

In addition, parents with children at home,When buying sunscreen products for children,Be more careful,It is best to use children's special sunscreen products,Because the food and drug administration has stricter approval standards for children's cosmetics.

Whether adults or children,Use sunscreen, a special category of cosmetics,Be sure to use approved,Products with special purpose cosmetics approval number,Ensure product safety.You can pass our WeChat official account.,get into Regulatory information Special cosmetics query Enter product name/Approval number ,Query product approval information.