Glycerine is a sweet, sticky, clear fluid used in all kinds of soap and toiletry projects, as well as in other types of projects.
Our glycerine is vegetable-derived and kosher.
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Can I use glycerin for my pressed glitters ? Or will it cause molding ?
Glycerin is hygroscopic and it attacts and holds water to it. Water is the cause of many apparent molds or growths in cosmetics. Without adequate preservation system, you will have mold. So you might consider using a preservative.
However, our tin pans are also going to rust if they are exposed to water. So even if you treat glycerin with a preservation system, you run the risk of rust developing if you put the product in a tin pan.
I thought it was ok to use glycerin to press glitter? I notice that TKB recommended that to someone else. Here I notice that TKB is saying that it can cause mold? If this is the case, what is the safest way to press glitter?
Glycerine does not cause mold. Water causes mold. Glycerine is the type of material that is called a humectant, meaning that it draws moisture (water) to it from the air. So, because the glycerine is attracting water to it, mold can form if the manufacturer does not use a proper preservative (in this case, our Cap 5).
I am not sure where you are seeing the statement on our site that it does cause mold, if you can let me know I'll fix it.
By the way, in our experimentations, we did find that glycerine was a very nice carrier for pressed glitters. Its natural stickiness was a real benefit.