Specific gravity: How you can use it to figure out how much you’re spending on ingredients! (Updated with downloadable Excel spread sheet!)

This came up in a group that I help admin on Facebook – The Skin You’re In – and I thought it would be a good exercise to learn more about how to apply the concepts of specific gravity.  I shared a series on specific gravity in January 2022 based on questions I saw in...

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Let’s talk about specific gravity (relative density or specific density) – part three, using it to measure fragrance oils and products

Welcome back to this series in which we’re learning more about specific density of our ingredients and why it matters. In part one, we talked about what specific gravity (relative density or specific density) meant, then we took a look at how we might make an anhydrous facial serum using these concepts. In part two, we looked...

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Let’s talk about specific gravity (relative density or specific density) – part two, using it to figure out how much foaming hand cleanser to make!

Welcome back to this series in which we’re learning more about specific density of our ingredients and why it matters. Yesterday, we talked about what specific gravity (relative density or specific density) meant, then we took a look at how we might make an anhydrous facial serum using these concepts. Today, let’s take a look at...

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Let’s talk about specific gravity (relative density or specific density) – part one, what is it and how can we use it to make an awesome facial serum?

Welcome to part one of a short, three part series on specific gravity! We’ll be taking a look at what this concept is, what it means for our products, how to use it to create a facial serum and foaming hand cleanser, and how it impacts fragrance oils. First, what is specific gravity? “Relative density, specific...

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#alltheingredients: Eutanol G 16 S (INCI: Hexyldecyl stearate) – Guerbet ester

Hexyldecyl stearate is a clear, liquid, slower spreading Guerbet ester with a light but rich, “intense”, non-greasy skin feel. It can be used as a dimethicone substitute in hair care products as it increases shine and works as an emollient. You may also find this as isocetyl stearate. I’ve found it under the brand names...

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