How do you know if sunscreen is chemical or physical???

In fact, sunscreen is also physical in terms of the principle of sunscreen, because it also plays the role of blocking ultraviolet rays.

It's just that it's a chemical ingredient, and even if the active ingredient is extracted from a plant, the medium, or something called a carrier, must be chemical.

Some sunscreens not only have sunscreen functions, but also whitening**, this is chemical sunscreen, not so much sunscreen, it is sunscreen and post-sun repair or a combination of sunscreen and whitening cream is more accurate.

The landlord should not believe the advertisement and some people upstairs talking nonsense, there is no "chemical" and "physical" distinction between sunscreen, and the principle of sunscreen is made by using the principle that some substances absorb relatively strongly in the ultraviolet band, so buy sunscreen on two indicators, five rules, see for details.

It's black, it's reflective, it's physical.

Applying it like a lotion has a kind of whitening effect and is chemical

Or when you buy it, you can ask the ba, right?

As long as you say that you want to apply it 20 minutes before going out, it is not purely physical, because the physical thing is applied at that time, and it will have an immediate effect.

In addition, in fact, pure physics is not necessarily good, but it is just a selling point now, physical sunscreen and chemical sunscreen can prevent the wavelength has its own strengths, in fact, the combination can be more effective.

In general, the words of the counter people can't be fully trusted, or choose a big brand, after all, the quality is more guaranteed in all aspects.

Physical sunscreen refers to the external protection of ultraviolet rays, such as umbrellas and shawls with ultraviolet rays.

Chemical sunscreens are sunscreens and the like.

Physical sunscreen is less harmful to the skin, because it directly reflects ultraviolet rays back, and chemical sunscreen is to achieve sunscreen effect by absorbing ultraviolet rays and causing a certain chemical reaction, in general, I think physical sunscreen is still better. Nowadays, many of them are a combination of physics and chemistry on the market, and you can ask the salesperson when you buy them.

And physical sunscreen? Rare.

1. If it only contains titanium dioxide and zinc oxide, it is pure physical sunscreen.

2. If it does not contain titanium dioxide or zinc oxide, it is pure chemical sunscreen.

3. In addition to containing titanium dioxide and zinc oxide, it also contains other sunscreen ingredients, that is, mixed sunscreen.

Physical anti-sun protection is a sun-protective clothing to prevent which vertical sun-drying hat parasol.

Chemical sunscreen is a sunscreen spray that has a chemical ingredient in a sunscreen that has a slimming additive.

According to the sunscreen principle, sunscreens can be divided into physical sunscreens, chemical sunscreens. So do you know how to distinguish between physical and chemical sunscreen? Let me tell you how to tell you the difference between physical and chemical sunscreens.

Basic understanding of physical and chemical sunscreens

Sunscreens can be divided into physical sunscreens, chemical sunscreens. However, chemical sunscreens are better in terms of skin feel and visual effect, while people who are more sensitive or extremely dry are more suitable for physical sunscreen.

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

Physical sunscreen.

Sunscreen particles are used to form a protective layer on the surface of the skin, reflecting light waves from ultraviolet rays that can cause damage to the skin, so as to protect the skin. The particles of physical sunscreen generally stay on the surface of the skin and are not absorbed by the skin, so the burden on the skin is relatively small, and it is not easy to cause skin sensitivity.

Chemical sunscreens.

By combining certain chemicals with cells, the part of UV rays that can be harmful to the skin is absorbed before the cells are damaged, so as to achieve sun protection.

Distinction between chemical and physical sunscreens

For a specific product, how can you tell if it's a physical sunscreen or a chemical sunscreen? From the perspective of general classification, in addition to the products that are specifically stated to be pure physical sunscreen, all kinds of sunscreen foundations, liquid creams, sunscreen powders, etc., are also pure physical sunscreens. The vast majority of other sunscreens and barrier creams are chemical sunscreens, or both physical and chemical sunscreens.

Some of this year's new products also add benefits other than sun protection, such as Olay Sunscreen Repair Lotion SPF30PA+++ to exfoliate and repair damage**, Clarins Anti-Wrinkle Sunscreen SPA 30 to effectively fight free radicals, etc. In addition, all creams and lotions with SPF are also chemical sunscreens.

Another way to tell the difference, of course, is to look at the ingredients. The physical sunscreens are mainly titanium dioxide (TiO2) and zinc oxide (ZNO); Chemical sunscreens are difficult to remember, these chemical terms are too annoying, you think to "figure out" the product instructions - usually physical sunscreens are described as ultraviolet "protective screens", "reflectors", "light blocking ingredients", etc., chemical sunscreens are described as ultraviolet "absorbers", "filters", "light filters", etc.

1. Physical sunscreen. Titanium dioxide and zinc oxide are both physical sunscreen ingredients, and their atomic particles are flakes, which reflect sunlight like a mirror, and can form a protective film on the sun, so that ultraviolet rays cannot penetrate the sun, and achieve the role of sunscreen.

2. Chemical sunscreen preparation cream. Contains chemical components that absorb ultraviolet rays, such as benzoic acid and its derivatives, cinnamic acid, etc. By applying it to the face, it converts sunlight into molecular vibrations or heat energy to protect against the sun.

Theoretically, physical sunscreens are more effective than chemical sunscreens.