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Unread 12-04-2007, 09:28 PM   #1
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How long is the storage life of makeup after you open it

Hi, have a quick question.

For items like liquid foundation and concealer, how long can you keep it before you have to throw it away?

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Unread 12-04-2007, 11:16 PM   #2
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I believe the recommended amount of time is One or two years.....

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Unread 12-05-2007, 10:03 PM   #3
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Depends on your cosmetic type and how much contamination you introduce to the product. Products that are more 'natural' are more prone to contamination as naturally derived preservatives to not work quite as well as the man made typical ones. Theoretically, according the the CTFA (cosmetics toiletries and fragrance association) and the USP (US Pharmacopeoia), typical Preservative efficacy testing (PET) indicates that your cosmetics should be able to last about 36 months, provided the company has performed the proper PET testing on their products prior to marketing. That is, Provided that you keep it at room temperature and not in the heat such as leaving it in the car. it lasts even longer if you refrigerate it (according to my company's stability technitian) and our own observances for re-testing products many years old.

Eye make-up such as mascarra and liquid eyeliners however, have a much shorter shelf-life because air exposure typically dries out the product, and the eye is very easily prone to infection. it is recommended you throw it out in about 3 months.
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