Period after opening (PAO). Some cosmetics should be used within a specified period of time after opening due to oxidation and microbiological factors. Their packaging has a drawing of an open jar, inside it there is a number representing the number of months. In this example it is 12 months of use after opening.Production date. Unused cosmetics also lose their freshness and become dry. According to EU law, the manufacturer has to put the expiration date only on cosmetics whose shelf life is less than 3 years. The most common periods of suitability for use from date of manufacture:Perfumes with alcohol - about 5 yearsSkin care - minimum 3 yearsMakeup - from 3 years (mascara) to more than 5 years (powders)Expiration dates may vary depending on the manufacturer.
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