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

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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Things to consider when choosing preservatives (Week four, part two, Newbie Tuesday: Making naturally compliant lotions with Ritamulse SCG)

Welcome back to this short series on choosing preservatives. I’m considering this part three of week three’s Newbie Tuesday series, Making naturally compliant lotions with Ritamulse SCG. Tuesday, January 14th, 2020: Shopping lists for ingredients, supplies, and packaging as well as optional components. Tuesday, January 21st, 2020: We took a look at the general formula we’ll…...

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Things to consider when choosing preservatives (Week four, part one, Newbie Tuesday: Making naturally compliant lotions with Ritamulse SCG)

Welcome to part one of week four, Newbie Tuesday: Making naturally compliant lotions with Ritamulse SCG. I realized I needed more time to talk about how to choose preservatives properly. I think it’s a topic we can all enjoy and discuss, but it’s a huge topic that needed to be split into two parts. If…...

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#alltheingredients: Sodium phytate (chelating ingredient)

Jen from Lotioncrafter was kind enough to send me some sodium phytate to play with over the summer.  Sodium phytate is a water soluble chelating ingredient we can add to our products at 0.05% to 0.5% to bind with metal ions to keep the ingredients from reacting with them. These metal ions can precipitate in…...

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#alltheingredients: Euxyl K 903 (INCI: Benzyl alcohol (and) benzoic acid (and) dihydroacetic acid) preservative

As we meet the preservatives in the Euxyl series, this PDF might come in handy… Euxyl K903 (INCI: Benzyl alcohol (and) benzoic acid (and) dihydroacetic acid) is a broad spectrum preservative that can be used in products that contain water, such as surfactant blends and emulsions. It’s considered naturally compliant. Benzyl alcohol is a polar molecule…...

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#alltheingredients: Euxyl K 900 (INCI: Benzyl Alcohol (and) Ethylhexylglycerin) preservative

Euxyl K 900 (INCI: Benzyl Alcohol (and) Ethylhexylglycerin) is considered by the company to be a strong broad spectrum preservative. “euxyl® K 900 is a liquid cosmetic preservative based on benzyl alcohol and ethylhexylglycerin. The addition of ethylhexylglycerin affects the interfacial tension at the cell membrane of micro-organisms, improving the preservative activity of benzyl alcohol…....

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Things we find in preservatives: Ethylhexylglycerin

You might see this ingredient in preservatives like Euxyl® K900 and Euxyl® PE 9010, so what’s it all about then? Ethylhexylglycerin is an alkyl glycerol ether we can use to boost the preserving power of ingredients like phenoxyethanol, methylparaben, and methylisothiazolinone, and works as an effective deodorant, inhibiting the growth of bacteria that might cause body odour…....

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Q&A: Which preservative works best with alkaline liquid soap? Let’s talk about the chemistry of soap, pH, and preservatives!

In the June Q&A, smc asked, Preservatives for liquid soap. I’m playing with liquid soap make, and due to the high percentage of water I’ll need a preservative. What preservatives work well in a high pH environment and doesn’t have a horrible scent? Thanks.  As a quick note before we start, I have pages where…...

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Preservatives: Let’s talk about hurdle technology and “self-preservation”

Thanks for joining me for this aside on the idea of a product that contains water, like a lotion, can be “self-preserving”. There’s a post on Lush’s site – A beginners’ guide to self-preserving – that we’ll get to shortly, but first, we need to take a look at the idea of hurdle technology, “a term used…...

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Practice your process: Choosing the right preservative for the job! 

We need to talk about a preservatives for a bit for both the Tarte Frxxxtion stick duplication and in general. When we’re formulating, we need to evaluate every product to see which preservative will work best with it. In most of the formulas I make, I use Germall Plus liquid because it works with the…...

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