What is SPF?

What is SPF?
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1 Answer

Answer :

SPF or sun protection factor is the measure of the amount of time taken by the sun light or more specifically the ultra violet rays to cause irradiation to the skin which is commonly known as sun burn on the protected skin. For example, if for your normal skin the time taken for irradiation is 30 minutes and after applying the cream the duration is 300 minutes, then the sun protection factor for that particular product is 300 divided by 30, that is SPF 10. Normally the time taken for irradiation by normal skin ranges from 20 to 30 minutes and so you can easily find how much SPF you need in your day cream by calculating the number of minutes you are exposed to the sun. With increased value of SPF, the number of minutes of protection increases. The SPF requirement increases with increasing t
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Related questions

Can a fair skinned person still get a tan when using a high SPF all over?

Description : Can a fair skinned person still get a tan when using a high SPF all over?

Last Answer : Do what you want, but sunscreen may help avoid sunburn, but doesn't usually help with skin cancer. If you really want a tan, you are best off working up to it. Get out into the sun for a limited time ... up and now I can be outside in just shorts and flip-flops for a couple hours and I don't burn.

Still getting a tan despite applying SPF. Am I going to be a leather bag when I'm 40?

Description : Still getting a tan despite applying SPF. Am I going to be a leather bag when I'm 40?

Last Answer : I worked outside all the time as a kid, and I still spend a lot of times outdoors. I turn darker in the summer, but my skin has held up well. If you’re using sunscreen you should be okay.

Anyone know a good face moisturizer with SPF?

Description : Anyone know a good face moisturizer with SPF?

Last Answer : I work for a dermatologist. Use Neutogenia Daily Moisturizer with SPF 45. It will work well for you without being greasy. We recommend it to all our clients. Good question Mica!

What sun block has the highest SPF?

Description : What sun block has the highest SPF?

Last Answer : Spawellness sell 100spf sunlotion.

Does a higher SPF sunscreen need to be applied less often than a lower SPF?

Description : Does a higher SPF sunscreen need to be applied less often than a lower SPF?

Last Answer : The SPF in the sunscreen plays no role in how many hours you can go without reapplication. If you need to quickly reapply your sunscreen after any water or exercise activities I highly recommend looking ... I use, needs to be reapplied once every 8 hours even after sweating or water play activities.

What SPF is best?

Description : What SPF is best?

Last Answer : SPF simply means "sun protection factor." The higher the number the better protection you have from the sun.

Do some beach tents offer SPF protection?

Description : Do some beach tents offer SPF protection?

Last Answer : Beach tents offer shade from the sun and can prevent sun burn. It depends on the material, the material has to be thick enough to not allow the sun to not penetrate.