Sun-screening medicine
It is a product to prevent aging of a sunburn and the skin, and stop being burnt on a day by blocking ultraviolet rays equal to the skin, and the sun-screening medicine (British: Sunscreen) is called the sunscreen again. It is creamy for a formulation, and a milk liquid form, a gel form exist and correspond to a sunscreen cosmetic in the Japan inside dimensions.
Table of contents
Ingredient of the day desperation stopper
I greatly divide the ultraviolet rays defense agent that is an ingredient combined with a desperation stopper on a day and can classify it in two kinds of "an ultraviolet scattering agent" and "the ultraviolet rays absorbent". According to the name, the diffusion agent lets you reflect ultraviolet rays each, and the absorbent absorbs ultraviolet rays and prevents ultraviolet rays from arriving on skin. A lot of absorbents are used for the expensive sunscreen of the effect such as SPF30 and 50. The ultraviolet scattering agent has many ingredients derived from a mineral such as titanium oxide and zinc oxide, and the ultraviolet rays absorbent has many synthetic compounds. When it absorbs the energy of ultraviolet rays, as for the ultraviolet rays absorbent, molecular structure may be destroyed in the property, and there is a possibility that a postlesional product causes an allergic reaction and inflammation. Therefore I cannot combine it other than a material published by a positive list of Ministry of Health, Labour and Welfare in Japan.
The study of cosmetics preventing ultraviolet rays only with the ability of herb and the flower advances recently without using titanium oxide, zinc oxide in organic cosmetics. As for the commercially available thing, SPF has much in comparison with around 3-6 and conventional sun-screening medicine weaker effect now.
Index of the ultraviolet rays defence
In Japan, PA classification is established for a defense index of the SPF level and UVA wave (wavelength 320-380nm) for a defense index of the UVB wave (wavelength 290-320nm) by association of cosmetics industry society in Japan. Other indexes are used globally (later description), and there is a delicate difference for the assay with the same defense index every area.
About the assay in the country, SPF, PA classification are based on the measurement when by 2 mg per 1cm2 applied a product to skin together, but I cannot really often apply it abundantly to there, and the product applied again is gradually lost by sweat and contact, deterioration by the ultraviolet rays itself. Therefore it is said that it is important not to neglect invention such as repainting it diligently without putting too much confidence in an index.
Index of the UVB defence
An index to express the degree of the effect that the SPF is an initial of Sun Protection Factor and interrupts a UVB wave among ultraviolet rays. The delicate difference is adopted for an assay in many countries so that it may be said that it is almost global standards although there is it. I am calculated whether skin called erythema or Sambourne causes stinging and inflammation becoming red. That you can tolerate ultraviolet rays of several times at the time of application in comparison with the smallest amount of ultraviolet rays that a subject causes erythema is a numerical ground of the SPF. For example, when the person who takes around 20 minutes before erythema appears paints with a desperation coup de grace on a day of SPF10, I bathe in the amount of ultraviolet rays of 10 times for 20 minutes, and erythema finally means that it is admitted. It is not a meaning to be able to tolerate ultraviolet rays (this case 200 minutes) at time of 10 times to be important. It is because the applied day desperation end is lost with time according to the said article.
Errors increase with a value, and, in a property of the technique to confirm the change of the color of the skin of the Homo sapiens by viewing, there is a way of thinking to be doubtful whether the real ability difference (e.g., differences between SPF55 and SPF60) between the products of the high SPF level goes along the number particularly, and there is it. Therefore I am to transcribe it into SPF50+ when ability more than SPF50 is significantly recognized in Japan.
In the United States, an advice to assume the upper limit in the indication 30+ is given, but because it is not essential, the product such as SPF100 is sold practically, but the movement that is going to raise the upper limit to 50+ exists [1]. All products must belong to anything of 6,10,15,20,25,30,50,50+ eight phases without the SPF indication being permitted only progressively in the EU countries (as for 50+ more than actual survey SPF60); [2]. In Australia, 30+ is the upper limit [3].
Index of the UVA defence
PA classification
The index indicating the defence of UVA which it is an abbreviation of Protection grade of UVA, and is adopted in Japan. I am calculated based on a phenomenon becoming black after a sunburn called the melanism immediately immediately. It is based on numerical value (later description) called PPD (Persistent Pigment Darkening), and 12 is within it, and a PPD level originally classifies it in four phases (if I include 無標 five phases) of PA++++ in PA+++ (effective very much), higher than 12 more than PA++ (with the considerable effect), 8 with less than 8 more than PA+ (with the effect), 4 with less than 4 more than 2. It is a classification method of the origin in Japan.
TPP
Numerical value to be the index of the sustained UVA defence to measure using melanism of the skin which is mainly caused by UVA called the melanism immediately, and to become the grounds of the said article PA classification classification. This PPD measurement technique in itself was developed in Japan, but is adopted positively in Europe while I remain in the indication of the PA classification using this in Japan.
It is similar to SPF for an idea, and that you can tolerate ultraviolet rays of several times at the time of application in comparison with the amount of ultraviolet rays of the minimum dose that skin makes black is a numerical ground of PPD. I mean what I bathe in ultraviolet rays of 10 double quantity and finally make black if I apply quantity fixed a desperation stopper for on a day of PPD10.
It is thought that it is a very important index in Europe, and it is said to the PPD level that it is not a desperation coup de grace on the day when you should reject it that is 1/3 of the SPF level. Was led by European trade group originally and was established; it is that bake it on that day, and the Europe government recommends the way of thinking for the coup de grace now [4], and a right logo is touched to the product which is equal to this condition.
Usage
- How to use depending on personal nature of skin is necessary. The nature of skin is classified in I - III, and I am separated by the easy sunburn.
- It is necessary to use cream of the appropriate strength even if I accept it at going out time.
- When the strength of the sunscreen applies the same quantity. If it is strong, and only a little applies it, there is not a meaning.
- Because sunscreen is easy to fall by sweat and swimming by sea bathing or the sports, it is necessary to paint with sunscreen diligently.
- It is not the simple sum, but an effect of the sunscreen increases more when originally I finish foundations with a coat of the sun-screening medicine from the cosmetics which an effect of the sunscreen is listed in.
- I use it after cream, and there is the method to use before the makeup groundwork.
- When around 30 minutes do not pass after usually painting, the sunscreen does not come into force enough. Not painting just before going out, and painting before a little of going out.
- It becomes hard to be assumed that I perform the humidity retention with sunscreen enough than a sunburn injury.
Side effect
In the case of a strong thing of SPF and the PA, a rash may be caused.
Influence on environment
That it is checked that the ingredients such as butyl paraben, cinnamate, benzophenone included in the sunscreen, the camphor derivative trigger it and cause whitening of the coral, and this happens by the induction of the increase of the virus which is harmful to a zooxanthella [5]. However, according to Robert van Woesik which is a specialist in coral, I do this study without reflecting real environment when the coral will not be exposed to density as I wake up whitening because I am diluted rapidly under the real environment [6].
Associated product
The suntan oil (it is said with suntan oil, the suntan product) is the same as sunscreen at the point to prevent a UVB wave among ultraviolet rays. But the suntan oil does not prevent the UVA wave unlike sunscreen. It is suntan oil that is intended that I do a sunburn (suntan) neatly without inflammation (Sambourne) being caused on skin by preventing only a UVB wave [7].
Chief ingredient
- Octyl methoxycinnamate (Ethylhexyl methoxycinnamate)
Footnote
- ^ [1]
- ^ [2]
- ^ [3]
- ^ [4]
- ^ Environ Health Perspect 116:441–447
- ^ Swimmers' Sunscreen Killing Off Coral
- ^ shopping こまつ. "Sunscreen @ sunburn" (Japanese). August 19, 2009 reading.
Allied item
- Sunburn
- Sunbathing
- Ultraviolet rays
- Photosensitivity
- Popular name when earless Yoshiichi - user often forgot to paint an ear, and a symptom appeared by the result
Outside link
This article is taken from the Japanese Wikipedia Sun-screening medicine
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