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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