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The Importance of Sun Protection Value
The main function of sunscreen is to prevent ultraviolet rays (UVA and UVB) from damaging the skin. UVA in ultraviolet rays can cause skin aging, pigmentation and wrinkles, while UVB can cause sunburn. Sun Protection Factor (SPF) is an important indicator for measuring the protective ability of sunscreen. Different sun protection values have different protective effects. Yunmei has detailedly introduced the sun protection effects of different protection values, which can help you better choose the sunscreen you need.

The Difference in SPF Values
1. SPF 15
Sunscreen with SPF 15 can block approximately 93% of UVB. Of every 100 ultraviolet photons, only 7 can penetrate sunscreen and reach the skin. Sunscreen with SPF15 is suitable for daily indoor activities, such as office work and short outdoor commutes.

2. SPF 30
Sunscreen with SPF 30 can block approximately 97% of UVB. It is only 4% more than SPF 15, but the sun protection effect has been significantly and obviously improved. It is suitable for daily outdoor activities, such as commuting to work, shopping, short trips, etc.

3. SPF 50
Sunscreen with SPF 50 can block approximately 98% of UVB. Of every 100 ultraviolet photons, only 2 can penetrate sunscreen and reach the skin. Suitable for long-term outdoor activities, such as beach vacations, outdoor sports, and long hours of outdoor work, etc. If you need to be exposed to the sun for a long time, we would recommend using sunscreen with SPF 50 more. It can provide more comprehensive protection.

4. SPF 50+
Sunscreen with SPF 50+ can block over 98% of UVB rays, providing the highest level of protection. It is suitable for extreme outdoor environments, such as high-altitude areas, deserts, tropical regions, etc. If you need to be active in these environments, sunscreen with SPF 50+ is the best choice.

Although the sun protection percentage of sunscreens is not much different, the difference lies in the duration of sun protection: for example, SPF30 can extend the skin's sun protection time by 30 times (30×15 minutes ≈450 minutes), and SPF50 can extend it by 50 times (50×15 minutes ≈750 minutes).

The Difference in PA Values
We always see PA+ on the packaging of sunscreen. This is the PA value, mainly targeting UVA (long-wave ultraviolet rays). Unlike UVB, UVA can penetrate through glass and enter our skin, so we should also take good protective measures indoors. UVA has strong penetrating power and can reach deep into the dermis, causing skin aging, wrinkles, long-term damage, and even skin cancer. The differences among sunscreens with different ingredients.
1.PA+2:24-hour protection, suitable for short-term use when going downstairs to buy things;
2.PA++ : Protection time is 4 to 7 hours, suitable for scenarios with short-term outdoor activities.
3.2.PA+++ : 8 hours + prevention, suitable for commuting to work;
4.4.PA++++ : Top protection, protection for more than 16 hours, suitable for outings, mountain climbing, seaside, high altitude, etc.

The Ingredients Chosen for Sunscreen
1.Chemical component sunscreen
The main chemical components of suncream include Octinoxate, Avobenzone, Silica, etc. These components can absorb ultraviolet rays and convert them into harmless heat release. However, it should be noted that certain chemical components may cause skin sensitivity in some people, especially those with sensitive skin. In addition, it may have an impact on the Marine environment. Some chemical sunscreens (such as oxybenzone) have a certain influence on Marine ecology and are not suitable for use in Marine environments.

2.Physical sunscreen
It mainly contains inorganic sunscreens, such as Titanium Dioxide and Zinc Oxide. These ingredients can reflect ultraviolet rays and cause less irritation to the skin.

3. Sunscreen with natural ingredients
Ingredient features: Natural ingredient sunscreen combines natural plant extracts with highly effective sun protection technology. For example, ingredients such as Centella Asiatica, Green Tea Extract and Chamomile Extract can not only provide sun protection, but also soothe the skin and reduce inflammation caused by ultraviolet rays.

4. Mineral ingredient sunscreen
Mineral ingredient sunscreens mainly contain natural mineral components, such as Talc (Talc), Mica (Mica), etc. These ingredients can reflect ultraviolet rays and have a good concealing effect at the same time. Suitable for sensitive skin and children, it has low irritation and is very gentle on the skin.

5. Bio-component sunscreen
Ingredient characteristics: Bio-component sunscreens mainly contain bioactive ingredients, such as Hyaluronic Acid, Collagen, Algae Extract, etc. These ingredients not only provide sun protection, but also moisturize and repair the skin.

The Correct Way to Use Sunscreen
The most important thing is to use enough: about 0.7 to 0.9 grams for the whole face. A 30-gram pack is only enough for one and a half months! In addition, a hat, sunglasses and an umbrella are also very important for physical defense. For daily use, choose SPF30 for lightness and no burden. When exposed to intense sunlight, SPF50 provides a full sense of security. Sun protection is not only for whitening, but also for blocking ultraviolet rays and anti-skin aging.
In addition, YUNMEI also offers customization services, which can customize sunscreens suitable for different skin types and usage scenarios according to your needs. Whether it's daily commuting or outdoor activities, YUNMEI can provide you with the most suitable sun protection solution.