Sunscreen is so important for skin even the USA government classified it as a Drug.
There are many benefits of applying sunscreen for instance It can save you from sunburn, Pigmentation, Hyperpigmentation even ageing.
Why Should I Wear A Sunscreen Even At Home
Remember the rule “when in doubt, always wear sunscreen”.
According to the American Cancer Society, the glass which Is used in car, home or office windows are designed to block most UVB rays, but it does not offer protection from all UVA rays. So even if you’re indoors, and close the window you still have a chance of the risk of exposure to UVA rays and possible skin damage.
80% Rays can pass through clouds, so it increases the chances of sunburns/ damages.
Know Everything About UV Rays
The ultraviolet light that penetrates our skin is made up of three types of radiations
UVA
UVB
UBC
1. UVA- It has the longest wavelength that reaches deep into the layers of skin, causing against wrinkles, ageing and pigmentation.
2. UVB- it has the largest impact on the top layer of skin. it causes redness, burning and skin cancer.
3. UVC- The shortest wavelength. it absorbed by the atmosphere.
What Does SPF Measures?
SPF stands for sun protection factor. It measures how well a sunscreen will protect skin from Ultraviolet(UB) Rays.
suppose if your skin would normally burn after 10 minutes in the sun, Applying 15 an SPF sunscreen would allow you to stay in the sun without burning for 150 minutes (15*10).
Though Its roughly estimated that Depends on skin type, skin color , intensity of sunlight and amount of sunscreen you applied.
For the best result expert believes use SPF 30; applying proper amount and Proper time (like apply Sunscreen in every 2 hours).
If you apply 30 SPF then it will protect you 20UVB and 10 UVA.
Many people under apply sunscreens, using 1/4th or half amount of sunscreen , only provide protection the square root of the SPF. For instance SPF 30 then (30)1/4th
ideally apply one gram of sunscreen to protect against sun damages.
High SPFs such as SPF 75, SPF 100 do not offer greater protection but it mislead people.
| SPF 15 Blocks 93% of UVB SPF 30 Blocks 97% of UVB SPF 50 Blocks 98% of UVB |
What Is PA?
PA is known as a Protection Grade of UVA.
SPF measures only UVB Protection while PA rating Only measures UVA Protections.
So Protecting yourself from both the UVA & UVB rays is very important.
Pa rating system was established in Japan as a informing consumer of the degree of protection provided by sunscreen.
Rating systems are as follow
| PA+ Some UVA Protection PA++ Moderate UVA Protection PA+++ High UVA Protection PA++++ Extremely High UVA Protection | |||
| For Protecting Your self from sunburn/damages Ideally Use Of combination Sunscreen. In the next blog, we will discuss the physical and chemical Sunscreen. |
7 Comments
With so many sunscreens to choose from, I’ve always been confused on what SPF is the best to use. Now I know that SPF gives the best results. Thanks for sharing this info!
SPF 30*
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