Know your sunscreen - SPF and more!

(Published on 16 January 2007 in 'Women at Work' - W @ W - a supplement of the Daily Mirror, Colombo, Sri Lanka)

There is one thing we people living in this part of the world love – smothering ourselves with a whole lot of creams and lotions that promise to make us… “fair and lovely.” Donning layers of foundation to camouflage ourselves is another obsession. My Aunt has been using a whitening cream for years. I hesitate to tell her that it has made little or no difference. I bought her a bottle of a sunscreen lotion the last time I went overseas. She looked at the jar with great suspicion and it lay on her dresser for months. What she failed to realise is that what is more important than the bleaching cream is the regular use of a sunscreen lotion.

A sunscreen, also known as sun block is a substance that helps protect the skin from the sun's harmful rays. It reflects and absorbs ultraviolet radiation. Lotions or creams that contain sunscreens are used not just to protect the skin from tanning but to help protect the skin from premature aging and damage that may lead to skin cancer. The best sunscreens protect against both UVB (ultraviolet radiation with wavelength between 290 and 320 nanometres), which can cause sunburn, and UVA (between 320 and 400 nanometres), which damages the skin with more long-term effects, such as premature skin aging.

But does one go to a supermarket and pick up the sunscreen lotion that promises the world – or does one pick up something as per one’s complexion and requirements? Sun screen lotions are graded as per their SPF value. SPF or - sun protection factor is a number representing the amount of sun that the lotion has the ability to block. That is SPF is a scale for rating the level of sunburn protection that a sunscreen product can provide. The higher the SPF, the more sunburn protection it gives. A sunscreen with an SPF of 15 filters 92% of the UVB. In other words the SPF 15 sunscreen allows a person to stay out in the sun 15 times longer. Sunscreens with an SPF value of 2 - 11 give minimal protection against sunburns. While, sunscreens with an SPF of 12 - 29 give moderate protection. And those with an SPF of 30 or higher give maximum protection against sunburn.

This brings us to the next question. How would one choose the best suited sunscreen for oneself? The answer lies in the colour of your skin as well as the nature of your work. Other factors to be considered are the skin type (sensitive skin), the amount of sunscreen applied and frequency of re-application as well as activities in which one engages for example, swimming. If your work requires you to be out in the sun for longer periods - the best sunscreen would be one that blocks enough UV radiation to protect your skin for the longest possible time. The chart below can be used as a guideline to obtain the proper protection:

.SPF 30 – 50: Fair; blonde, light brown hair; unexposed skin is white; freckles. Tans lightly and usually develops a painful burn quickly.

.SPF 15 – 20: Average Caucasian; unexposed skin is white. Develops an average tan and moderately burns.

.SPF 6 - 15: Medium complexion; unexposed skin is light brown; usually with dark hair and dark eyes. Tans easily and burns minimally.

.SPF 2 – 10: Dark, unexposed skin is brown. Tans easily and rarely burns.

Most sunscreens work by containing either an organic chemical compound that absorbs ultraviolet light or an opaque material that reflects light, or a combination of both. Absorptive materials are referred to as chemical blocks, whereas opaque materials that reflect are called physical blocks. Research has shown that the best protection is achieved by application 15–30 minutes before exposure to the sun, followed by reapplication 15–30 minutes after the exposure begins. Further reapplication is only necessary after activities such as swimming or excessive sweating. However it is advisable to consult a skin specialist when choosing a proper sunscreen especially if you have sensitive skin and are prone to photosensitivity.

Interestingly, clothing also provides protection from the sun. The ‘protectiveness’ of clothing can also be measured by SPF. The following are SPF's of various types of clothing:
Stockings - SPF 2
Caps / Hats / Shade - SPF 3-6
Light summer clothing - SPF 6.5
Thick cottons/ sun-protective clothing - up to SPF 30

And to my Aunt who has just consumed yet another jar of whitening cream…
“Its beauty that captures your attention; personality which captures your heart.”
You need to start focussing more on enhancing your personality!

Miss Know-All
miss.know.all@gmail.com