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Keep in mind that not all hard oils make a long-lasting soap. Coconut oil is high in lauric and myristic acids, which make a hard soap but one that dissolves quickly. Stearic and palmitic acids, on the other hand, contribute to a long-lasting bar. If you use the Soapee calculator, it has a...

While these ingredients are hygroscopic, they will never absorb enough water from the atmosphere to lose effectiveness as a preservative, especially once the lip balm is hardened in a tube, tin, etc, where air exposure is limited. Not unless you intentionally introduced other aqueous ingredients...

Glycerin and honey are self-preserving As a general rule that would be true, but not in this case. Glycerin itself is a preservative, in sufficient concentration (think of herbal glycerites, like tinctures but extracted and preserved with glycerin instead of alcohol). Similarly, sufficient...

Using glycerin in lip balms, etc I see this is an old thread, but it came up pretty high in a related Google search, so maybe someone else will find this additional information helpful. It is true that glycerin is water soluble and does not work well in oil-based applications without an...