How Does Sunblock Work in Protecting Skin?
If you are often under day-to-day exposure to sunlight, you may already be familiar with sunblock or sunscreen. Sunscreen is a care product that can protect skin from the sun.
Each sunblock product offers a variety of different specifications. Some contain high SPF and some have low SPF. However, do you know how sunblock actually works? Which product best suits your needs? Here it is a complete guide to choosing and using sunblock properly.
How does sunblock protect the skin?
Sunlight emits enormous energy. Included in this energy is ultraviolet radiation (UV). The radiation consists of two types, namely UVA and UVB. Both of these radiation can be absorbed by human skin. When absorbed by the skin, UVA and UVB risk causing various skin problems, ranging from premature aging, sunburned skin, to cancer.
This is because the radiation is able to change and damage cells in your body. So, being exposed to sunlight without protection for a long time is risky for your health.
To protect the skin from the dangers of UVA and UVB radiation, sunblock or sunblock will prevent the absorption of radiation into the surface of the skin. The content that is quite dominant in sunblock is zinc oxide (zinc oxide) and titanium dioxide. Both of these active substances function as a shield on the surface of the skin.
Because of these two active ingredients, usually the texture of sunblock feels more concentrated than lotion in general. After splitting the body with sunblock, usually on the surface of your skin there is a white layer. This layer will ward off harmful radiation.
What does SPF mean for sunblock?
You will find information on SPF levels on each sunblock package. SPF levels indicate how long you can stay in the sun without burning.
Everyone has a different tolerance level to UVA and UVB radiation. People who have bright skin color will usually only be exposed to sunlight without any protection for 10-12 minutes. After that, the skin will burn and harmful radiation from the sun will be absorbed by the skin.
Meanwhile, people with darker skin can usually survive for about 50 minutes. The brighter and more sensitive your skin, the lower your tolerance to sunburn.
If you have brown skin, you can be in the sun without protection for about 20 minutes. If you use a sunscreen with SPF 15, that means you can stand it for 15 times your tolerance level. So, you can be protected from sun radiation for 20 minutes x 15, which is 300 minutes.
How to use sunblock properly
To get maximum protection from sunblock, you need to use it properly. Find out below if your sunblock has been used correctly.
Always use a sunblock even if you don't plan to go outdoors.
Apply sunblock for at least 15 minutes before going outside.
Even though the weather is cloudy and the sun doesn't sting, it doesn't mean you are free of UVA and UVB radiation. So make sure you keep using sunblock when outdoors on a cloudy day. Moreover, the weather may change at any time and the sun may suddenly appear.
Use sunblock with at least SPF 30 levels, especially if your skin is pale or you are sensitive to sunburn. The higher the SPF, the smaller your risk of exposure to radiation.
Reapply sunblock on the skin after a few hours. This is because the protective effect of sunblock will diminish over time.
If your skin sweats or when you swim, sunblock will not last long on the skin. Even if you choose a waterproof sunblock, the average durability is only around 40-60 minutes when exposed to water. Then you have to apply sunblock to the skin again.
Applying sunblock thinly will not provide maximum protection. The more you use sunblock, the better the results. Flatten the entire surface of your skin and massage lightly so that it is absorbed faster.
Note the expiration date on the sunblock package. Replace your sunscreen immediately if the expiration date has passed because its properties have been lost.