Benefits of SPF Cream and How it works

What is Sun Screen Factor SPF ?

Sun Screen Factor SPF

 

SPF, or sun protection factor, is a measure of how much sunscreen protects the skin from UVB rays, a type of radiation that causes sunburn, damages the skin, and can contribute to skin cancer. If your skin usually burns 10 minutes from the sun, applying sunscreen (SPF 15) will allow you to stay in the sun without burning for about 150 minutes (15 times longer). This rough estimate depends on the type of skin, the intensity of sunlight and the amount of sunscreen used. SPF is actually a measure of protection against exposure to UVB rays and is not intended to help you determine the duration of exposure.

 

UV-B Rays


For best protection, experts recommend using sunscreen for 15 sun protection agents, apply the appropriate amount (2 mg / cm2 of skin, or about one ounce to cover the entire body) and re-make every two hours.

Most people apply sunscreen, using half the amount required. Using half of the required amount of sunscreen only provides the square root of the SPF. So, applying a half sunscreen with SPF 30 protection only provides an effective SPF of 5.5!

What is SPF sunscreen factory sunscreen

 

SPF Fake vs Real

The SPF (Sun Protection Factor) is not linear:

  • SPF 15 blocks 93% of UV rays

    SPF 30 blocks 97% of UV rays

    SPF 50 blocks 98% of ultraviolet rays

So one way to look at this is that the sunscreen SPF 30 gives you more than 4% protection from SPF 15.

Another way to look at it is:

    SPF 15 (93% protection) allows 7 out of 100 photons through

    30 SPF (97% protection) allows 3 out of 100 photons through.

So, although you may not double your protection level, the SPF 30 will mask half of the radiation that SPF 15 allows for your skin.
What is the SPF sun protection factor? Al Ghurair Balsam

It's complicated, but to keep it simple, most dermatologists recommend using sunscreen SPF 15 or SPF 30.

Why not use sun protection? SPF-100 sunscreens with SPF-75 or SPF-100 do not provide far greater protection than SPF 30 and mislead people into believing they have more protection than they actually do. In addition, in order to obtain broad protection from the spectrum, the UVA protection must be at least 1/3 of the UVB protection. SPF UVB UV Protectors usually provide much greater protection than UVA, thus providing a false sense of complete protection.
Badger's SPF Sunscreen Testing All Sunscreens must undergo FDA-approved SPF tests to submit an UVB claim. There are three main types of SPF; SPF fixed, SPF 40-minute waterproof, SPF 80-minute waterproof. All sunscreen manufacturers must adhere to the same FDA approved tests, which ensures that SPF claims are consistent in all sun, chemical and mineral protectors. All SPF tests are performed in vivo (with human subjects)


Related Tags: Sun Protection Sunscreen Lotion

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