If you want good skin, you should do a good job of sunscreen. In fact, we need sunscreen all the year round, not only in summer, so how long is the shelf life generally open? The following is with her time Xiaobian together to understand it!
How long is the shelf life of sunblock usually open
Unopened sunscreen has a shelf life of 1 to 3 years. If it has been opened, it is best to use it within a year, because exposure to air and improper storage can greatly reduce the effectiveness of sunscreen, and can lead to skin allergies. Many people think they only need sun protection in the summer, but it’s not. Sunscreen is to be done all year round, whether it is sunny or rainy, UV rays will not disappear, to reduce UV damage to our skin, we need to use sunscreen. But many people don’t know the expiration date of sunscreen and how long it will last. So when buying sunscreen, look for the expiration date on the package.
Some are marked “6M”, “12M”, which means the product will be used up within 6 or 12 months. This is the recommended time limit if the sunscreen is already open, which can be stored for one to three years. Sunscreens are protected by the addition of titanium dioxide and zinc oxide, which are stable and do not spoil over time. But sunscreens are packed with many other ingredients, and there’s no guarantee that they won’t deteriorate in high temperatures and prolonged exposure to air.
Some people do not pay attention to the environment when storing sunscreen, and directly put it in the high temperature, which will shorten the use time of sunscreen, and also more likely to lead to the deterioration of sunscreen. So keep sunscreen in a cool, dry environment. Prolonged exposure to air and the effects of high temperatures after sunscreen is opened can also foster some bacteria. So when the sunscreen has been open for a year, the original sunscreen effect is not only weakened, but also can increase the burden of skin, causing skin allergies.
Which comes first, isolation cream or sunscreen
1. Function
The main function of sunscreen is to protect against UV rays and minimize the irritation and damage caused by UV rays to the skin. There are two main types of sunscreen, chemical sunscreen and physical sunscreen, and there are corresponding sunscreen products on the market. The barrier cream is designed to prevent airborne radiation and dust from damaging soft skin. At the same time, isolation cream belongs to makeup products. Its texture is similar to that of primer, which can prevent the skin from being damaged by cosmetics, and also has the effect of modifying and brightening the skin tone. This sunscreen is hydrating, oil-free formula, refreshing, moist, innovative water molecules, completely different from other sunscreen cream greasy texture, fully prevent UV; And give you high index perfect sunscreen care, let you this summer, not afraid of the sun, not afraid of greasy, refreshing sunscreen all day.
2. Differences
For girls who need a high level of sun protection, it is important to remember to apply sunscreen before applying the cream, so as to provide UV protection. If you are lazy and use a sunscreen with a low SPF as a sunscreen, you will not only have no sunscreen effect, but also waste the use of the cream. It’s also a mistake to use sunscreen instead of sunscreen when you need to protect your skin from computer radiation or makeup. It brightens the skin, it’s very even, it’s a very thin layer, it’s not greasy, it moisturizes well, it’s natural, it’s easy to absorb.
3. Order
When it comes to figuring out where to apply sunscreen and sunscreen, it’s important to keep in mind that sunscreen is the last step in skincare, and isolation is the first step in makeup. Isolation as a makeup base, when making up to first base, so that not only can isolate cosmetics and skin contact, but also can make the makeup more delicate and comfortable. Sunscreen should be on the last step. The barrier cream keeps the sunscreen from coming into direct contact with the skin. It also helps to hydrate the skin and reduce irritation.
The above introduction about the shelf life of sunscreen after opening and the sharing of other relevant content can be used as reference suggestions. For the above problems, we will introduce it here, hoping to help you better understand the shelf life of sunscreen.
