| First of all, we need to understand what is UVA 🌤 VS UVB ⛅️ ? |
| These are two types of ultraviolet light that can damage the skin ⚡️ , UVA has a longer wavelength and stronger penetrating power, can penetrate the surface of the skin 🧘♀️ , penetrate into the tissues below the dermis, destroy collagen, and cause the skin to sag and loosen and aging 💔 . UVB is medium-wave ultraviolet rays, it will gather on the surface of the skin, causing the skin to become red or sunburned, but UVA is 15 times stronger than UVB 🔅 . |
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What is SPF❓ |
| International cosmetic labels are all SPF values✴️ , which generally represent the time multiples of preventing UVB sunburn. For example, SPF30 means that you can prolong the time of being sunburned by 30 times. SPF1=15 minutes. Generally speaking, we need two hours Apply sunscreen again. Also, the PA value is to prevent UVA ☂️ , respectively PA+, PA++, PA+++, PA++++, so the more +, the stronger the ability to prevent UVA 💕 , this has nothing to do with time. |
| What are physical sunscreen and chemical sunscreen🌞 ? |
| Physical sunscreen mainly relies on titanium dioxide and zinc oxide in physical sunscreens, which can directly reflect the sun's rays and reduce absorption. The advantage is that it does not irritate the skin, but it is also prone to whitening and greasy skin. |
| Chemical sunscreens are sunscreens that absorb the sun 🌝 rays and convert them into lower energy to release, thereby avoiding the damage of ultraviolet rays to the skin 💙 . Chemical sunscreens will feel more refreshing when used, but for people with sensitive skin, they are prone to allergies, etc. question. Therefore, people with sensitive skin are generally not suitable for using chemical sunscreens. |
| How do we choose sunscreen 💛 ? |
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There are also many kinds of sunscreens, we simply divide them into several categories: shakers, sprays, lotions, and gels. |
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Generally oily, mixed, sensitive skin is more suitable for shakers, sprays, gels, refreshing and non-greasy, and not prone to acne ❗️ ❕ Dry skin is more suitable for lotion, which moisturizes the skin and does not make the skin tight🖤 . In summer 🎈 you should choose SPF 50 to prevent UVA more effectively, and you can choose to use lower than SPF 50 in spring, autumn and winter. |
