Spring sun protection eleven must know the terminology

● UVA: UVA express. If direct exposure to UVA, the skin reaction are browning more quickly and directly, and will not cause inflammation erythema, tanning is not sunburn easily.

● UVB: Ultraviolet B express. After UVB irradiation, skin cells vulnerable to damage to the photochemical reaction, resulting in injuries, resulting in erythema inflammation, emergence of the phenomenon of sunburn.

● SPF: is an acronym for Sun Protection Factor, the general Chinese translation is “sun protection factor.” SPF measurements are for the UVB.

● MED: MED is the abbreviation for Minimal Erythema Dose, the Chinese translation is “red skin caused by the lowest dose.” Means the acceptance of UVB irradiated skin, when it began to generate reddish dose. The dose varies from person to person are the.

● PA: labeled sunscreen for UVA defense capability standards. The role of UVA is usually chronic and long-term, testing and standards for the purpose of comparison it is varied, so that a sign for many more. However, the current can be seen marking the domestic or the value of the main PA. It is mainly divided into three levels, respectively, are +,++,+++。 Plus many more express stronger defense capability. For yellow, the + + These are the best choice of comparison.

● SPF Determination

Determination of SPF is to first detect subjects in the absence of sunscreen products applied prior to MED, and use every square must be applied ﹝ 2 ﹞ mg comparison of the MED. In other words, the subjects 10 minutes before use has been drying red, the use of sunscreen only after the required 150 minutes of drying red, were used before and after the MED has increased 15 times. The multiplier is that this sunscreen product measured by SPF. For example, if the SPF value of 15 means that after 150 minutes the skin will be red; SPF30, it means that only after 300 minutes the skin red, and so on.

● non-comedogenic: indicates that the product will not cause acne, skin fit easily than oil acne of people long.

● Waterproof: means the sunscreen will ensure that within 80 minutes after the water has the effect of sunscreen.

● Water resistant: means the sunscreen will ensure that within 40 minutes after the water has the effect of sunscreen.

● Sweat resistant: with sweat resistant effect, the role of sunscreen products, of course, such products can not compare with the effects of waterproof waterproof sunscreen role of the Product.

● Hypoallergenic: low sensitivity of products. That the sunscreen product suitable sensitive skin and children.

● Oil Free: Oil-free sunscreen refreshing. Products you will be light as long as Mr tigerish Department in the back of the hand or, if the skin can be quickly absorbed, non-greasy, non-oil and feeling cool and humid, which can be found on the product are qualified refreshing sunscreen.