The secret to applying sunscreen [The secret to the amount and method of application]
Did you know? There is a set amount of sunscreen you should apply.
" 2 mg / cm2".
What on earth?!
This is the amount set by the Japan Cosmetic Industry Association as the "standard amount for measuring SPF ." SPF is the "strength of sunscreen power" written on the sunscreen package.
What this means is that the manufacturer can promise that if the user applies 2 mg per 1 cm2 of skin, the stated effects will be achieved.
Uh,
Even if you say that...
I've never measured the area of my face!
It's unclear how many mg of cream you should put on your palm!
As for the area of the face, according to a paper that looked at "the area of each part of the body of Japanese people", "the head and ears together take up about 1,200 cm2."
Hmm, that means the area you need to apply sunscreen to is estimated to be around 500cm2 .
In other words, 2 mg x 500 cm2 is 1000 mg.
Apply 1g of sunscreen to your face.
That seems to be the case. Come to think of it, many sunscreen sample sachets also contain 1g !
However, there was a trap!
This is also a point made in a recent paper.
Apparently, when you transfer sunscreen from a container to your hands to apply it, more than 20 % of it remains on your hands.
This means that in order to apply the prescribed amount of 1g , you would have to take 1.25g in your hand!
It looks like this!
You often hear people say, "You should apply two pearl-sized amounts of sunscreen." That's how much you need.
I'm wearing pearl earrings today.
Something like this
You can see that it's quite a lot ( lol ) .
The sunscreen I use contains 30g . If you take 1.25g of it every morning, it lasts for 24 days. If you take 1g , it lasts for 30 days. I see, one bottle lasts about 4 weeks to a month. That's great!
Using the product within one month of opening means using it while the cosmetic ingredients are still fresh, which is the best for your skin.
Sunscreen also oxidizes if left unattended. It's a big no-no to leave it on for a season after you buy it, or even to leave it on until the New Year!
I'm not a shill for the manufacturer. If you don't apply a lot, you won't get the results you expect! Well, just listen.
I am here every day in my office to receive consultations about skin blemishes, dullness, and whitening.
Nowadays, most people who visit a cosmetic dermatologist
"I always wear sunscreen!"
He says.
"But, I get sunburned easily and get age spots easily."
It continues:
"How much do you apply each day?"
"Um, I guess it's about this much?"
"Oh, I thought so! That amount just won't do."
Sunscreen is all about quantity!
The biggest waste is to use too little, because if you only use a little, the whole amount will go to waste.
Now, I'll show you how to paint it.
The correct way to do it is to apply it in two coats!
First, take one pearl.
First, apply it to your forehead, cheeks, nose, chin, etc. and spread it evenly.
One coat completed
Already white
Repeat the second time, applying the remaining pearl-sized amount to various parts of the face and spreading it evenly.
Please forgive me, but at this moment my face is sticky and I'm going to put it on the back of my hand ( lol )
Second coat finished
Pure white... it's even stuck to my hair ( lol )
The sides of the face are particularly prone to blemishes, so be sure to pay close attention when applying sunscreen to these areas!
Leave on face for 10 minutes
I guess it's starting to feel a bit familiar???
The sticky feeling has completely subsided.
To be honest, it's a pain to take so much time to apply so much sunscreen every morning before going to work...
But!
I repeat!
Sunscreen is all about quantity!
Please reconsider the amount of sunscreen you apply and how you apply it.
However, some people don't like applying a lot of sunscreen at once. If that's the case, you can just apply it diligently, at intervals of 2-3 hours, to build up a thick layer of sunscreen.
Actually, I am also very busy in the mornings, so sometimes I can't put on a lot of sunscreen at once. On those mornings, I leave the house knowing that the sunscreen layer hasn't formed yet. And I take physical measures against sunburn, such as using a parasol or sunglasses!
But .... I wonder if manufacturers could somehow develop a sunscreen that requires only half the amount we currently use...I know it would be extremely difficult, but that's what I ask of you as a consumer!
Finally, let me clear up this misconception.
"Sunscreen alone without foundation alone will not protect your skin."
No, no. You can complete your morning preparations with just sunscreen .
In the first place, foundation is not meant to protect the skin, but to make the skin tone look even. Even if you apply sunscreen afterwards without foundation, you won't have to worry about your foundation smudging!
Aoharu Evangelist Eriko Koyanagi