A recipe for SPF (sun protection factor) includes ingredients in the products, the broad spectrum protection and also the skin's natural burn time. Knowing your personal equation is easy...how long would it take you to burn in natural sunlight without protection? For example, for a fair skin it may be 10 minutes burn time, so by adding an SPF15 to the equation the skin is protected for 150 minutes (10x15=150).
There are two types of sunscreen, a physical which physically reflects the sun from the skin and a chemical which allows the rays to penetrate into the skin and the ultra violet rays create a heat sensation and it deactivates the rays. For sensitive skins it is important to wear a physical sunscreen because this prevents the skin from reacting to the heat from the sun and the product.
Buying broad spectrum (UVA symbol) sunscreen is vital now as the skin needs protection from UVA rays all year round. There are three classifications of broad spectrum sunscreen- Low, Medium, and High depending on the UV protection. It is now required by the EU that product ranges label their sunscreens with the broad spectrum symbol, protection factor and the level of protection. Low sunscreens are usually from 6-10SPF, medium from 15-25SPF, and high protection SPF30-50, and very high is SPF50 and above.
What does that mean? A general example is that an SPF15 will protect the skin from 94% of UVA rays, SPF30 protects from 97% UVA rays and 45-50SPF protect from 98% UVA rays. Sunscreens block the UVB rays which are mostly from the sun, but it's the UVA rays that are important to remember to protect your skin from all year round.
Dermalogica has thoroughly researched their ingredients and found an ingredient that enables a higher protection without the added chemicals. These plant oleosomes are found in the seeds of plants that carry natural vitamin E. This newly formulated technology allows them to be mixed with sunscreens helping to boost the sun protection factor. The natural plant extracts help to provide an emulsifying effect making the products non-irritating and creating an easily absorbed non-greasy texture to the product.
What does that mean? A general example is that an SPF15 will protect the skin from 94% of UVA rays, SPF30 protects from 97% UVA rays and 45-50SPF protect from 98% UVA rays. Sunscreens block the UVB rays which are mostly from the sun, but it's the UVA rays that are important to remember to protect your skin from all year round.
Dermalogica has thoroughly researched their ingredients and found an ingredient that enables a higher protection without the added chemicals. These plant oleosomes are found in the seeds of plants that carry natural vitamin E. This newly formulated technology allows them to be mixed with sunscreens helping to boost the sun protection factor. The natural plant extracts help to provide an emulsifying effect making the products non-irritating and creating an easily absorbed non-greasy texture to the product.
Reading the Ingredients in a product can help you understand what you are putting on your skin and what type of sunscreen or block you are buying as that aspect isn't always clearly labelled.
A physical sunscreen is good for sensitive skins, they still block the whole spectrum of ultra violet rays and the lack of chemical ingredients prevent the skin from reacting. Look for main ingredients such as titanium dioxide and zinc oxide in these sunscreens. Ingredients in a chemical sunscreen are often avobenzone, octinoxate, oxybenzone, and ethylhexyl methoxycinnamate which means they can protect at a higher level. Sometimes sunscreens are a mix of chemical and physical protection ingredients which are usually ok for sensitive skins, but it's always best to test on very sensitive skins.
To protect the skin for two hours of sunlight a teaspoon is required for the face, neck and decollate and a shot glass worth of sunscreen to protect the body. If you're on holiday it is necessary to reapply your spf every two hours and remember 'water resistant' sunscreens are only effective for 40 minutes in the water and protection should be re-applied once you're out of the water.
To protect the skin for two hours of sunlight a teaspoon is required for the face, neck and decollate and a shot glass worth of sunscreen to protect the body. If you're on holiday it is necessary to reapply your spf every two hours and remember 'water resistant' sunscreens are only effective for 40 minutes in the water and protection should be re-applied once you're out of the water.
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