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What is difference between UPF and SPF? There are two kinds of skin-damaging ultraviolet rays. Long wave UVA rays and medium wave UVB rays. Both are harmful and link to skin cancer and aging. UVB rays cause sunburns. UVA rays penetrate windows and are responsible for tanning and premature aging. UPF refers to the Ultra
There are two kinds of skin-damaging ultraviolet rays. Long wave UVA rays and medium wave UVB rays. Both are harmful and link to skin cancer and aging. UVB rays cause sunburns. UVA rays penetrate windows and are responsible for tanning and premature aging.
UPF refers to the Ultraviolet Protection Factor UPF which is a measurement of the amount of UVA and UVB rays that a fabric blocks.
SPF refers to the Sun Protection Factor which is a measurement of the amount of UVB rays a sunscreen lotion will block. The lower the number, the faster you’ll burn. Sunscreen should be reapplied regularly, at least every two hours.
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