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Anonymous users2024-02-10Hello, Know Me Cosmeceutical Skin Consultant is happy to help you.
Choose sunscreen according to your actual situation.
Explain SPF and PA. SPF is the English abbreviation of Sun Protection Factor, which is the ability of sunscreen skin care products to protect against ultraviolet rays. The higher the SPF index, the greater the protection given to **.
Different SPF values indicate different amounts of time for effective sun protection. Specifically:
SPF 15 = 15 * 10 = 150 minutes.
SPF 20 = 20 * 10 = 200 minutes.
SPF 30 = 30 * 10 = 300 minutes.
SPF 50 = 50 * 10 = 500 minutes.
PA stands for UVA (UVA is the effect of aging skin**) and is a Japanese sun protection index measure that measures the stability of persistent melanin deposits (PPD) after 2-4 hours of sun exposure. The more PA+, PA++, and PA+++ words there are, the better the effect of preventing UVA and the longer the effective protection time.
PA+: Indicates that it is effective, and the protection time is about 2 to 4 hours.
PA++ means quite effective, with a protection time of 4 to 8 hours.
PA++ means quite effective, with a protection time of 4 to 8 hours.
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Anonymous users2024-02-09The higher the better.
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Anonymous users2024-02-08If you are outdoors in summer, you already have melasma, or people who are prone to sunburn, you should use SPF50, PA+++ If you spend a short time outdoors, then you can do general sunscreen, SPF30, PA+++.
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Anonymous users2024-02-07SPF is the sun protection factor, for example, if you stay in the sun for 20 minutes without sunscreen and your ** back turns slightly red, then a SPF 15 product can protect you for up to 5 hours.
20 (minutes) x 15 (SPF) = 300 minutes (5 hours)
You can choose SPF 5-8 sunscreen for daily care, shopping, and shopping, and SPF 10-15 sunscreen when you go out. Use a waterproof sunscreen with SPF 20-30 when swimming or sunbathing.
Use it at the right time: Don't use sunscreen before applying makeup, and don't wear sunscreen before leaving the house. Sunscreen, like other skin care products, takes some time to absorb into the skin, so you should apply sunscreen 10 to 20 minutes before going out and 30 minutes before going to the beach.
The amount of sunscreen should be sufficient: Usually the amount of sunscreen applied to ** is 2 mg per square centimeter to achieve the desired sun protection effect. And the SPF value cannot be cumulative, and applying two layers of SPF10 sunscreen will only have one layer of SPF10 protection.
In fact, the sun protection factor is only a reference number, in fact, it must also be considered according to the individual's skin type, sun reaction, color, activity and sweating status, generally speaking, Oriental daily protection and maintenance only need to choose the sun protection factor SPF15 or so.
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Anonymous users2024-02-06SPF is an abbreviation for "Sun Protection Factor" and is a measure of the effectiveness of sunscreen protection**. The aim was to compare the length of time that different types of sunscreens have caused redness and swelling damage to UVB. Generally, there are two types of sunscreens: physical and chemical.
Physical sunscreen is somewhat similar to the effect of using opaque substances such as silt to block sunlight. The sunscreen effect is better, but it hinders the appearance of whitening. It is usually used on the body, hands and feet.
Chemical sunscreens use the ability of chemicals to absorb ultraviolet rays directly, making them light-colored or even colorless. It's just that the sun protection is poor. If you insist on making a chemical sunscreen with a high SPF value, it is likely to cause an allergic reaction due to the high concentration of the chemical.
Generally speaking, SPF 15-30 products are sufficient to meet the needs of daily life.
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Anonymous users2024-02-05It's a student, right? Only when you go to the beach do you need to use SPF 50 and above, and SPF about 20 for daily sunscreen is enough. And you shouldn't have the habit of removing makeup, you need to remove makeup after wearing a sunscreen with a high sun protection index, and you can only use facial cleanser if you have a low sun protection index.
The SPF has been explained by the upstairs, so let's not talk about it. You also need to know that sunscreen also depends on the PA index, daily use of PA++ is enough, PA seems to be UVB-proof, you need both to have it to really protect the sun.
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Anonymous users2024-02-0450!?Definitely too high.
It is only used for military training and tourism, and the degree is so high, it is very hurtful to use SPF25.
You often play basketball in the big sun, and SPF30 is enough.
Keep sun protection in mind when traveling.
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