In summer, the first thing to do is to protect yourself from the sun. So many women will choose sunscreen skin care products, the common is sunscreen. But you know what? There are a lot of rules about how to use sunscreen. Let's see, how to use sunscreen skin care products correctly?
How to use sunscreen skin care products correctly?
UVA,, which is the main cause of premature skin aging, can penetrate the dermis, make the skin dark, and lead to lipid and collagen damage, causing skin photoaging and even skin cancer.
UVB, it can reach the dermis, so that the skin is sunburned, causing skin peeling, erythema and other phenomena, but it can be isolated by glass, sunshade, clothing, etc.
The sun protection time is lower than the theoretical value
We all know that the sun protection index represents its sun protection time, such as SPF30 sunscreen, theoretically can help us to block UV 30×20=600 minutes, but this is only laboratory data, in fact, dust, sweating will make the sun protection time greatly discounted, so do not think that the sun protection multiple is high is safe, like the sun is so strong now, It is recommended to make up every two hours. If the skin is sensitive, or do not want too much sunscreen to damage the skin, we can use sunscreen on the basis of wearing a wide brim hat and sunglasses to help protect the sun.
The sun protection effect has nothing to do with the sun protection index, not the higher the sun protection index, the better, but the higher the sun protection index, the more sunscreen agents used, the greater the burden and damage to the skin. Therefore, if you do not need to stay outdoors for a long time, do not choose products with too high SPF, especially for people with sensitive skin, it is better to choose a sunscreen below SPF25.
Chemical sunscreen should be applied half an hour in advance
Many people already know that sunscreen products should not be applied before going out, at least 20 minutes to half an hour in advance. In fact, this is mainly for chemical sunscreen products, because the sunscreen in chemical sunscreen is actually a UV absorber, after application on the skin to have a certain reaction time to take effect. The principle of physical sunscreen is to use mineral powder, pearl powder, etc., to refract sunlight, there is no need to apply in advance. However, due to the use of pure physical sunscreen, sunscreen products to maintain a long time, the powder is too thick, so the current SPF more than 15 sunscreen products, most of the combination of physical sunscreen and chemical sunscreen, need to be applied in advance.
One milliliter on your face and neck
We all know that sunscreen needs a certain amount to be effective, and how much is enough? The amount of the whole face and neck reaches 1 ml to reach the sun protection time it marks.
In addition, the SPF does not add up, you use sunscreen, SPF cream and powder, sunscreen time is the highest SPF. But isn't it true that sunscreen won't work if you use sunscreen creams or powders? Of course not, because sunscreen must be fully covered, and reapplying the primer and foundation will help to supplement the coverage in areas you didn't apply evenly or overlooked. It should also be noted that sunscreen has a certain irritation to the eyes, so especially when using high index sunscreen, it is better to avoid the eye area, so as to avoid sweating and eye irritation, resulting in redness and tears.
How to use sunscreen skin care products correctly? I believe we all have a certain understanding of this. Sunscreen skin care products are not randomly applied can play a sunscreen effect, we should correct this misunderstanding in time.
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