whats the diference between sunblock and sunscreen?

Question

so which one would be best sun block or sun screen?

Answer 1

Sun screen will protect you from the rays of the sun but will allow some to get through. Sunblock will block all rays and will not let skin get damaged.

Best to ask your local chemist
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Answer 2

Different ingredients. Sunscreens are made from chemicals that absorb ultraviolet radiation, which prevents it from getting to your skin. Sunblock is a physical barrier between your skin and the ultraviolet radiation. Remember the surfer movies where they had a big white stripe on their nose? That's old fashioned sunblock (zinc oxide, etc). It was ugly, and people didn't like to use it. New sunblock is transparent. (Also, technically, clothing is a form of sunblock).

As far as which is best, well, which you choose is less important than how you use them. Sunblocks work immediately - once it's on, it's blocking the rays. Sunscreen takes about 20 minutes to become effective, so you should apply sunscreen 20 minutes BEFORE you go out in the sun. Most people don't do this. Both can be washed off by sweat and water, so if you're exercising or swimming, reapply frequently. Also, many people don't understand the SPF rating. A higher SPF means you can stay in the sun longer than you could without sunscreen or sunblock. If you have very fair skin you need a higher SPF. However, there are UVA and UVB rays, and sunscreens don't protect against them both equally.

The most important thing about application, and the one that people fail at most, is quantity. Most people do not use enough sunscreen when they apply it. There's a website link below that gives a great example of how much to use. (once you get through all the mathspeak) Take a beer or soda bottle cap (the metal pointy ones). For your face and neck, apply half a cap of sunscreen. For your arms, apply one cap each, and for your back, front, and both legs, apply two caps each. That's a total of 11 1/2 bottle caps worth of sunscreen.

Have you heard of the ABCS of skin protection?
A - Avoid being in the sun, especially between 10 am and 4 pm. Seek the shade if you must be outdoors
B - Block the rays using a sunscreen or sunblock with a higher SPF
C - Cover up your skin (and hair and ears!) with clothing and hats. Be especially careful about the top of your head, ears, and nose, and the back of your neck. Hats should have wide brims.
S - Speak out about the dangers of sun exposure.

Answer 3

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.

Answer 4

one blocks the other screens

Answer 5

one blocks the uv rays and one will let some in