How do Sunblocking Products Work?

Sunscreen refers to cosmetics that are added to block or absorb UV rays to prevent skin from being tanned or sunburned. According to the sun protection principle, sunscreens can be divided into physical sunscreens and chemical sunscreens.

Sunblock

Sunscreen needs to choose products with different SPF or PA values according to the specific object to achieve the purpose of sun protection. Sunscreen works by isolating the skin from UV rays. The main difference between sunscreen and sunscreen is in physical properties. Creams generally have a water content of about 60% and look more "thick" and paste-like; while emulsions with a water content of more than 70% appear to be relatively thin, there are fluidity. Generally speaking, emulsions are more refreshing than creams because the water content is higher, but formulators can still use different oily ingredients and thickeners to adjust the "greasy" degree of creams. Therefore, you still need to look at the product itself.

Chinese name: Sunblock
Foreign name: sunscreen

Category: Special cosmetics
Effect: UV protection

Sunscreen Basic Information

Sunscreen ^[1] refers to cosmetics that have the effect of shielding or absorbing ultraviolet rays, reducing skin damage caused by sun exposure, melanin deposition and skin aging.

How to use sunscreen

(1) In principle, it can be used with multiple sunscreens.

(2) Use your fingertips to adjust the sunscreen and place it on the forehead hairline, forehead, ears, nose, cheeks, perioral, neck, side of the neck, front of the neck, front of the chest, and V in the order from top to bottom. Back of hand, wrist extension, etc. For example, in summer, all light-exposed areas such as double forearms and lower legs should be included to avoid omissions.

(3) Use fingertips to gently spread sunscreen on each part

(4) When a light-sensitive patient visits the doctor, the physician should remind the patient to pay attention to the parts that are prone to omission.