all about sun care : how to choose and apply your sun care products

evil-sun

 

 

As many of you know, the sun is our frenemy. While it gives life to us, it also does damage to our skin. The sun also causes a lot of skin problems,  to name a few : it accelerates aging,causes pigmentation, overactive sebum secretion, big pores etc.

 

 

Do you know with every 1°C increase of your skin temperature, the level of sebum increases by 10% ? This increases probability of your skin being affected by acne, wide pores, etc.

 

 

According to the research conducted by Seoul National University – when the skin is exposed under the sun for 15 minutes, the temperature of the skin can rise up to 43 degrees!

 

 

So Hope In A Blog has come up with a short and precise guide for your summer sun care products!

 

 

The Two Different Type Of Sun Filters

 

Here is a great chart from skinacea :

imageimage

 

 

How To Read Sunscreen?

 

 

In most Asian sunscreen, you’ll notice two readings : SPF and PA

 

SPF : Stands for Sun Protection Factor – a measurement for UVB Protection

 

PA : Stands for Protection grade of UVA – a measurement for UVA Rays.

 

 

uv-rays

 

 

What is the difference between UVA or UVA?

 

Source :  WHO

 

 

UV rays are divided into three categories based on their wavelength.

 

  • UVA rays long wavelength (320-400nm)
  • UVB rays medium wavelength (280-320nm)
  • UVC rays short wavelength (280nm and below)

 

 

While shorter wavelength are the most damaging to skin, UVC rays and shorter-wavelength UVB rays are absorbed by the ozone layer and never reach the earth. Therefore, UVA and longer-wavelength UVB rays have the potential to cause the most harm to skin.

 

 

  • UVB

UVB is very biologically active but cannot penetrate beyond the superficial skin layers. It is responsible for tanning and burning your skin (sunburn), and makes it look darker ; in addition to these short-term effects it enhances skin ageing and significantly promotes the development of skin cancer. Most solar UVB is filtered by the atmosphere. ( UVB are reflect by glass )

 

 

  • UVA

The relatively long-wavelength UVA accounts for approximately 95 per cent of the UV radia
tion reaching the Earth’s surface. It can penetrate into the deeper layers of the skin and breaks down collagen in our skin. Furthermore, it also contributes to skin ageing and wrinkling. For a long time it was thought that UVA could not cause any lasting damage. Recent studies strongly suggest that it may also enhance the development of skin cancers. ( UVA are not reflected by glass and are let through, so even if you’re indoors, UVA rays can still get to you! )

 

 

 

sunnn

 

 

Measuring The Protection Of SPF and PA

 

  • SPF

 

The numeric value indicates how long the sunscreen will allow you to stay in the sun before experiencing ‘sunburn’ or the darkening of your skin.

 

For example :

 

It takes 10 minutes under the sun for Sally to experience sun-burn/sun-tan (reddening or darkening of the skin). If Sally uses a sunscreen with an SPF 15, it means that Sally is able to protect her skin from the sun 15 times longer. Therefore, Hyuna is able to stay 10 minutes x 15 (SPF) = 150minutes under the sun protected before she experiences any redness/darkness on her skin.

 

 

  • PA

Soure : Skincareclub

 

 

The PA rating system was developed by Shiseido and has then been used in every Asian sunscreens. It is based on the Persistent Pigment Darkening (PPD) reaction reading after 2-4 hours of sun exposure. PA is a protective level of strength to mark the three PA+, PA++ and PA+++. Theoretically, a sunscreen with a PPD rating of 10 should allow a person 10 times as much UVA exposure as would be without protection (same principle with the SPF example).

 

 

For example :

 

PA+ provides some UVA protection with a factor of PPD 2-4. It protects sensitive skin against low to medium UV radiation.

 

PA++ provides moderate UVA protection with a factor of PPD 4-8. It offers better protection from UVA rays and can be used by people with normal skin exposed to medium UV radiation.

 

PA+++ provides good UVA protection with a factor of PPD > 8. It is the strongest grade of UVA protection now available. It is designed for normal skin under very strong or direct UV radiation.

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Categories: Beauty Articles
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0 responses to “all about sun care : how to choose and apply your sun care products”

  1. In ur opinion, do u think that powder sunblock works equally with lotion or cream sunblocks?
    Somehow I got the feeling that since powder is not being absorbed, so it may not be effective enough
    thx for ur responds! N congrats on the new blog! ^^

  2. thanks rey!

    i think the sunpowder also helps in reflecting uv rays away from the skin. though powder doesnt absorb, they insert themselves well ‘in between the skin and pores’ which can also help in sun protection! on top of that, extra protection always helps, and they can help absorb excess sebum!

  3. thanks for the quick response!

    yeah, I was actually gonna use sun powder only for touch-ups n still using creamlotion sunblock in the morning. I was thinking of OHUI sun powder, does it have shades or just transparent? I remember saw somewhere that it has 2 shades, white and beige. but I cant find the information of the shades on their website. do u know about that?
    thx again ^^

  4. darn the OHUI sun care article has a problem! yeah, i remember it having 2 shades, but i recommend the beige one!

  5. I decided to get the sample first, found it on gmarket
    not sure bout the shade, not many info written on the seller’s desc >_<
    but well, since the sample is pretty cheap, it wont hurt as much as if I bought the full ver in case it doesnt work out for me haha
    oh n just wanna share some opinion. I found out that everything that u put on ur face at one time does affect each other. I'm currently trying out sum water gel cream samples. The first day I put it on, somehow I felt like it makes my face look a bit darker. The next day I try it again but switched to a korean suncream (prev its jap sunmilk) n my face gets brighter. So maybe there's smth on the jap sunblock that doesnt agree with sum's gel haha

  6. lol. i love sum37′s waterfull line. it plumps up the skin and feels like the cells are so happy bursting with water haha. and it makes ur skin feel realllly smooth

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