I don’t know who else to turn to for this sort of thing, but there is a company (I won’t say their name) that makes pressed glitters without preservatives, they used humectants, which are known to grow mold after a while.
However, recently a lot of people have been posting on Instagram that they suspect their pressed glitter pans might be developing mold. So after a month of abusive posts, lies, and comments from the owner, she decided to buy this mold testing kit called "Healthful Home 5 Minute Mold test" which detects 32 types of mold. She offered this up as proof that her cosmetics are safe and mold-free. I still think it’s a lie to be honest.
If mold were to grow on a preservative-free cosmetic item that used humectants, would one of these types of mold be detected on this mold test? Thank you to whoever can help me with this.