Does Hydrogen peroxide go off - tinting?

[gemmamcleod]

Hi all, i brought my eyelash tiniting kit in college and opened it about 5 months ago. i remeber my lecturer saying they can oxidise (evaporate) after 6months to a year. I have done a few treatments and its still nearly full and smells fine. I just wondered how long they last when opening and if i would notice when it went off, or if i can use until it evaporates?
xx

 

[Ruth Mills]

Hydrogen peroxide spontaneously degrades into oxygen and water over time. It will last longer if kept in a cool dark place. If it's still working fine when you do your eyelash tinting then it's probably still OK. If you find that your tints don't "take" as well after a while, then it's probably time to replace it...