Month: September 2018

Weekend Wonderings: Can I combine cationic ingredients with non-ionic or anionic surfactants?

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I’m doing my best to respond to your comments, but considering the other day I made it through three comments before spending a morning researching and writing yesterday’s post on cetrimonium chloride, it’s not as simple as writing a few lines and being done if I want to offer you the most information I can....

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What’s the suggested usage rate for cetrimonium chloride in leave on products?

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I get this question all the time, so I thought I should write a post that’ll come up in searches for future reference… Cetrimonium chloride is a positively charged or cationic ingredient that acts as a good detangler by reducing combing forces, which reduces friction on our hair. We can use it as the main...

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Chemistry: Rheology modifiers – Introduction and defining some terms: Yield stress and shear

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On September 7th, we started this series off by looking at why xanthan gum might pill or ball on your skin when used in lotions. Then we started this series, for which I’ve also created a glossary of terms as we’ll be using them a lot in the future… Defining some scientific terms: Solubility, viscosity,...

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Considering the effect of different combinations of oils & butters in a basic lotion

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Let’s take some time today to see how this all comes together in choosing butters and oils for our lotions! Defining some scientific terms: Solubility, viscosity, surface tension, and interfaces Defining some scientific terms: Contact angle, wetting, refractive index, and specific gravity Defining some cosmetic chemistry terms: Spreadability, play time, cushion, drag, and melt point...

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Why is the cosmetic formulator concerned with solubility, viscosity, surface tension, contact angles, wetting, refractive index, specific gravity, spreadability, play time, cushion, drag, and melting point?

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I thought we’d take some time to process what we’ve learned over the last few days about these very interesting concepts by considering some emollient combinations. Defining some scientific terms: Solubility, viscosity, surface tension, and interfaces Defining some scientific terms: Contact angle, wetting, refractive index, and specific gravity Defining some cosmetic chemistry terms: Spreadability, play...

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