Preservatives

Newbie Tuesday & Formulating Friday: Creating emulsions with Simulsol/Lotionpro™ 165 – part two, thickeners, rheology modifiers, and preservatives! (Week one)

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Six plastic bottles containing preservatives sit atop a metal plate on a digital scale

Welcome to part two of our introduction to the Simulsol/Lotionpro™ lotion making series/course for both the beginners’ Newbie Tuesday series/course and the more advanced Formulating Friday series/course. Yesterday, we met the emulsifier and looked at how to formulate with it, so today we’re looking at the thickeners and rheology modifiers we’re using for our formulas,...

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Preservatives: Choosing preservatives that work with cationic emulsifiers

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In the previous Newbie Tuesday and Formulating Friday series/course, we took a look at different preservatives we could use instead of Germall Plus liquid. For the Ritamulse SCG series, we considered those which would work for anionic or negatively charged emulsifiers; for the Polawax, e-wax NF, Phytomulse, or Natragem EW series, we considered those that...

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Recall: Arbonne’s Shea Butter Body Wash! An interesting study of preserving our products

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The FDA has put out a recall for Arbonne’s Shea Butter Body wash because “because product testing by the manufacturer revealed the presence of Pluralibacter gergoviae.” This bacteria “is an opportunistic pathogen that has repeatedly been isolated from personal care products.” (Reference) This isn’t the first time this company has been involved in a recall...

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Q&A: Euxyl PE 9010: What does “high levels of surfactants” mean when it comes to inactivating it?

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Quick note: The picture above is of the bubble baths we made in our live Zoom meeting on May 2nd, the formulas for which you can find as a post and as a PDF by clicking this post. This formula doesn’t contain the surfactants I mention in this post: I chose this shot because I...

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Q&A: What’s the reason for putting silver in cosmetics?

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In the January Q&A, Emma asked: I have a question about some products I recently received as a gift from my brother in Berlin. There is a really nice store there called Urban Cosmetics and they have a lot of natural products, hydrosols, etc. Reading the ingredients I notice they put silver in their serum and...

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