What are esters? Part one: The chemistry and nomenclature

A thin, clear, yellow liquid in a shot glass, this is Sensolene

You might remember our series to figure out what a polar oil might be – part one, hydrocarbons and part two, polar oils – as we struggled to make that darned TKB Thickening clay work. This was supposed to be part three at the time, but we went on holiday and the computer died and...

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How the ingredients determine the pH of a shampoo bar, and testing Lush’s Jumping Juniper bar

When we were at Windy Point Soap Making Supplies two weeks ago, we had great fun testing the pH of various Lush products, including three shampoo bars – Jumping Juniper, Montalbano, and Trichomania – as well as two “self-preserving” shower gels, Honey I Washed the Kids and The Olive Branch. Let’s take a look at...

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Testing the pH of stuff at Windy Point Soap!

We had much fun playing with our new pH meters in the pH & preservative class at Windy Point Soap Making Supplies in Calgary last night! Michele and I popped into the local Lush to buy a few products for testing as we’ve always been curious about the pH of some of their products. We...

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An aside on rheology modifiers: Wetting, dispersing, and hydrating

As you saw in this post recently – magnetic stirrer with hot plate – we heated our water phase that included hydroxyethylcellulose (HEC) on the magnetic stirrer with hot plate as it needs both agitation and heat to fully hydrate this starch. Why did we need to do that? It’s the idea that thickening ingredients...

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Chemistry: Formulating with pyrrolidine carboxylic acid (PCA) – zinc PCA

We find this compound, pyrrolidine carboxylic acid (PCA), with sodium or zinc as a salt we can use in our products, and as a component in the natural moisturizing factor of our skin. It’s a type of salt, which means it’s an electrolyte, so it can mess with the viscosity of our gels, emulsions, and...

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