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The SPF (sun protection factor) of a sunscreen is a laboratory measure of its effectiveness. The higher the SPF, the more protection a sunscreen offers against the Ultraviolet type B radiation that causes
sunburn. For example SPF 15 means that a user can nominally
remain in the sun 15 times longer than would otherwise cause them to have sunburn.
Titanium dioxide blocks the UVA and the UVB sunrays. UVB is the
burning rays and the UVA are the skin sagging, wrinkle causing and
cancer causing sunrays.
The SPF is an imperfect measurement of skin damage, because invisible damage and skin aging is also caused by the very common Ultraviolet type A, which does not cause reddening, or pain.
Some broad-spectrum sunscreens do provide significant UVA protection. Take notice of the chart below as to the two that have the greatest ratings: Titanium dioxide - up to 25 percent and Zinc oxide - up to 25 percent; From Wikipedia, the free encyclopedia.
Due to consumer confusion over the
real degree and duration of protection offered labeling restrictions are in force in several countries. In the United States in 1999 the FDA decided to institute the
labeling of SPF 30+ for sunscreens offering more protection, and a similar restriction applies in Australia.
This was done to
discourage companies making unrealistic claims about the level of protection offered e.g "all day protection", and because an SPF over 30 does not provide significantly better protection.
The following are the FDA allowable active ingredients in sunblocks:
p-Aminobenzoic acid (PABA) - up to 15 percent.
Avobenzone - up to 3 percent.
Cinoxate - up to 3 percent.
Dioxybenzone - up to 3 percent.
Homosalate - up to 15 percent.
Menthyl anthranilate - up to 5 percent.
Octocrylene - up to 10 percent.
Octyl methoxycinnamate - up to 7.5 percent.
Octyl salicylate - up to 5 percent.
Oxybenzone - up to 6 percent.
Padimate O - up to 8 percent.
Phenylbenzimidazole sulfonic acid - up to 4 percent.
Sulisobenzone - up to 10 percent.
Titanium dioxide - up to 25 percent.
Trolamine salicylate - up to 12 percent.
Zinc oxide - up to 25 percent.
Anti-Aging Clinic’s Titanium dioxide (full spectrum sunblock formula):
Titanium Dioxide 100% Pure:
Allows clients to customize the application of sun protection. Provides optimum Sun Protection: Add a few drops to a dime size portion of moisturizer before applying to face and neck.
Distilled Water, Titanium Dioxide.
Apply generously and evenly
on face and neck. Apply foundation. Re-apply after swimming, excessive sweating, toweling or after 80 minutes of sun exposure.