Shelf life is a false concept after cosmetics in kaifeng?

Text/lu xun said: there are two trees in front of the my house, a tree is jujube, another is Chinese jujube. Atkinson said, cosmetics has two shelf life, one is you know the shelf life of, the other one is after opening shelf life. Two days before, there are fans in pro consulting background: cosmetic shelf life exactly what happened after the kaifeng? What happened? Pseudo concept? Based on the spirit of pursuing knowledge, art specially to turn over the 'modern Chinese dictionary' : shelf life refers to the product under normal conditions can ensure the quality, time limit for the safe use of. The cosmetic shelf life is self-evident. So, what is shelf life after kaifeng? As the name implies, is the cosmetics after opening under normal conditions can ensure the quality, time limit for the safe use of. About after opening, however, shelf life, the cosmetics industry there are two kinds of different sounds. Guangzhou, says one senior cosmetics formula under normal circumstances, the cosmetics will add a dose of stabilizers, preservatives, to ensure the quality of cosmetics in the warranty period, avoid bacteria pollution, loss of effective components, etc. But when in use after opening, because of the air to enter and use the changes in the environment, such as temperature, light, will inevitably cause the secondary pollution, lead to shorten the shelf life. Therefore, cosmetics will have a shelf life after opening. However, guangdong another cosmetics production enterprise technical director to think, after opening shelf life is a false concept. Secondary pollution, he said, there are, indeed, 'the crux of the problem is that no one can prove that the secondary pollution is caused by the user or the product itself, there are too many uncertain factors among this, use the time to limit, not science. 'The other international well-known raw material enterprise senior technical specialist, said under normal circumstances, the enterprise will through accelerated aging and microbial challenge test to estimate the product shelf-life after opening, this has certain conversion relation between. Influence factors, in fact, cosmetic shelf life after opening in the international market has been included in the regulations. According to the European Union issued 'regulations of the eu cosmetics, shelf life of products more than months, small packaging products must be labeled with the use after opening. Art ( WeChat ID: pro) Found that almost all Europe and the United States department of cosmetics brand in the product label on the bottle shelf life identification after opening, 'M', 'M' and other words, representing the product after opening for a period of months and months. At present, our country has not yet been to strict rules of 'guarantee period after opening', however, kans, beautiful skin, wetherm, treasure porcelain muscle, lancer, such as brand, also on the packing marks on the shelf life after opening. Overall, according to the different category, ingredients, packaging, cosmetics after opening shelf life is different also. It is not hard to see, usually skin care products ( Including eye cream) After opening about the - shelf life Months, mainly because of skin care products contain high nutrition ingredients, susceptible to secondary pollution. Overall, make-up products after opening shelf life fluctuation is larger. Like liquid, paste, makeup, most of shelf life for six months to one year, and dry powder, can achieve two years. The guarantee period of the after opening and cleaning products are usually in a year or so, however, like Fancl such flagship brand of the concept of 'add', because the anti-corrosion system is weak, so obviously shorter shelf life after opening, only to - Months. In addition to differences in category and composition, the packing is also a big factor. Estee lauder eye essence cream, for instance, the packaging is open bottle, shiseido repair eye cream is squeezing pump head, relatively speaking, the latter is the possibility of secondary pollution is small, so the latter after opening long shelf life than the former. The senior cosmetics formula also say the open shelf life is mainly determined by the nature of the contents and characteristics of packaging container, generally high nutritional skin susceptible to secondary pollution, exposure to bottle packing also susceptible to secondary pollution, so after opening short shelf life. Necessity from this view, after opening shelf life does exist, but there is no domestic relevant specification, the attention of consumers is not high. An annual experience BA tell atlas ( WeChat ID: pro) , most consumer is buying cosmetics, they are not specially after consulting kaifeng shelf life. , visited more than wuhan cosmetics shops, many stores BA are also said to know shelf life after opening, but in no standard specification, consumer awareness is not high also, they will not be mentioned, but part of the main product of the concept of 'natural' without adding class will be emphasized after opening it is recommended to use time. Mentioned above well-known raw material enterprise senior technical specialist, said more than after opening shelf life of cosmetics, skin care products, in particular, may be led to the decrease of the efficacy of active matter is the biggest consequences, so use this kind of products at the same time of influence product efficacy, may produce bacterial contamination, do not rule out the possibility of skin will have an allergic reaction. Editor: huang rui