Preservatives

Question from Patreon: Does polyquaternium 10 have a shelf life? Is acetic acid or aspen bark extract a good preservative?

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In the July Q&A on Patreon, Belinda asked: I have two questions…1) do you know if polyquaternium 10 has an expiration date? I’ve checked the website I bought it from (Personal Formulator) plus a couple more that sell it, and I’ve not seen anywhere if it does, indeed, expire. The reason I ask is because...

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Weekday Wonderings: Substitutes for parabens in an emulsified scrub?

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In this post, One ingredient, ten products: Incroquat BTMS-50 in an emulsified scrub, Febe asks: Love the recipe. I am concerned about Phenonip and the parabens. As I see the INCI Phenonip is Phenoxyethanol (and) Methylparaben (and) Ethylparaben (and) Butylparaben (and) Propylparaben. It has parabens and I am trying to stay away from them. I see...

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Weekday Wonderings: Is anyone using Spectrastat G2?

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In this post, A bunch of comments I missed in March, Kathrine asks: I was curious if you had any insight on the efficacy of using Caprylhydroxamic Acid (and) Glyceryl Caprylate (and) Glycerin as a preservative. I haven’t been able to find a lot of information on it, other than the suppliers who swear by...

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Weekend Wonderings: How can you incorporate a preservative into a shampoo bar?

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In this post, Liquid Germall Plus, Irina asks: Could you be so kind to show us the process itself, how do you incorporate a preservative in to solid conditioners and shampoo bars, please? Preservatives are heat sensitive, but bars are getting had, not pourable way before 40 C, how do you manage to put the...

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Weekend Wonderings: Other names for ingredients? Will this preservative be effective for this product?

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In this post, Road trip essentials: Solid scrub bars, Neha asks: Can I use sodium benzoate as a preservative in emulsifying sugar scrub? My local vendor is unable to understand optiphen. Or can you help me with any other name for this preservative? If you want to know more about preservatives, the first thing to...

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