Signup
LoginSunblock/Suncreen and all SPF-related discussion
39 posts
-
-
do u know tt sunblock/sunscreen is very impt (even w/o makeup)?
helps in anti-aging as harmful UV rays will damage our collagen fibers, which will make our skin "age" faster......Q. Whats the Difference Between a Sunscreen and a Sunblock?
A.
Sunscreens are the most popular at the moment. Available in creams, lotions and gels, they contain chemicals that absorb UV rays. They are also inconspicous on the skin. The chemicals that are most often found in sunscreens include PABA, Benzophenones, Cinnamates, Salicylates,
Sunblocks instead of absorbing UV rays, reflect them. At one time sunblocks could be spotted by the opaque white film, but new technology has created sunblocks with particles so tiny, that the opaque film in no longer noticeable. Chemicals most common in sunblocks include Titanium dioxide and zinc oxide.
What's an SPF?
Sunblocks and sunscreens are rated with SPF numbers. SPF refers to the "Sun Protection Factor" for UVB rays only. A sunscreen with a SPF of 15 will delay sunburn from occurring for 15 times (in minutes) longer than normal if using no protection at all. For example, if it takes someone 20 minutes to sunburn and they applied a sunscreen with an SPF of 15, they would be able to remain in the sun for 300 minutes (15x20). SPF's are rated typically from 1 to 60, although there are some products with an even higher rating. While most suggest an SPF of 15 for everyday use, the activity, time of day, time of year, and the duration should all be considered.
-
-
-
In the past, PABA has been widely used as a UV filter in sunscreen formulations. However, it has been determined that it increases the formation of a particular DNA defect in human cells, thus increasing the risk of skin cancer.[2] Currently, safer and more effective derivatives of PABA, such as octyl dimethyl PABA, are more commonly used.
http://en.wikipedia.org/wiki/Para-Aminobenzoic_acid
Environmental + Health News also reports that Oxford University scientist John Knowland shows that PABA* seemed to damage DNA, thus increasing the risk of skin cancer. He recommends using non-PABA products.
http://www.natural-health-information-centre.com/paba-oxybenzone.html
-
-
-
Originally posted by FireIce:
went to watsons to find sunkiller clear water but it's soldout. (cos now got 20% off)
a few weeks oredi
i told u wat u neber go and buy straight awayjust now i showed my sister
but she neber buy
becos she said she still got 1 big bottle (dunno for body 1 she also use for face or what man tsk)
PP watsons got a lot of stock
1 whole range 排美美 there
-
