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Infographics refer to the visual representation of information, data, and knowledge. They are useful when selecting cosmetics. In particular, when choosing sunscreen, infographics for sunblocks are very important because one must interpret various complex numbers to select a suitable product. As a tool that visualizes scientific information in an easy-to-understand manner, they provide significant assistance in product selection.
How should you read a sunscreen infographic?
The term "Broad Spectrum" means that the product blocks both UV-A and UV-B wavelengths. Since almost all products sold recently are "Broad Spectrum," you can generally overlook this detail without paying much attention. SPF stands for Sun Protection Factor; SPF 30 and SPF 50 are numerical indicators of the degree of UV-B blocking, with higher numbers representing better protection. Sometimes, products are labeled SPF 50+ with a "+" after the number, indicating a protection factor of SPF 50 or higher.
PA stands for Protection Grade of UVA, which indicates the level of protection against ultraviolet-A rays. The degree of protection is expressed using plus symbols (+, ++, +++) rather than numbers. The more plus signs there are, the higher the level of protection. For daily use, choosing a product with SPF 15 or higher is sufficient, while for outdoor activities, it is recommended to select an SPF 30 or higher with PA+++. If the amount used per application is about the size of a fingernail, the usage is relatively small, so in this case, choosing a product with a higher rating is beneficial.
You may also see products labeled "Water resistant (40min)" or "80min" at the bottom. This indicates a duration of effectiveness of 40 or 80 minutes, and the U.S. FDA prohibits the use of the word "water-proof" on product labels. Just because such a label is present does not mean you can use the product with peace of mind while swimming; it is essential to reapply it every two hours if you sweat or enter the water.
It is time to actively use sunscreen. To achieve maximum protection, you should apply a broad-spectrum sunscreen that blocks both UVA and UVB rays in a sufficient thickness 15 to 30 minutes before going outside. The purpose of sunscreen is to prevent the formation of blemishes and freckles, as well as to prevent skin aging and skin cancer. However, sunscreen is not a panacea for these prevention efforts. Even if you apply a sunblock product, you still need to make an effort to reduce your exposure to UV rays. In other words, when exposure to UV rays is high, you should seek shade to minimize exposure, and a comprehensive UV protection package—such as wearing a hat or protective clothing—is helpful.