Testing

Testing the shelf life of your products: Observing a naturally compliant lotion for rancidity

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I realized I haven’t shared much about testing our products – a great question that came up in the live Zoom meeting about oils yesterday – so I thought I’d share my experiences with one of my favourite lotions for shelf life. Whenever I make a product, I like to observe it for 6 months...

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Get a thermometer already! Equipment review

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As I’ve been as wandering around the ‘net over the last few weeks, I’ve noticed people aren’t bothering to measure the temperature of their products any more. A popular blogger makes lotions by telling you to put the heated water phase and heated oil phase in a double boiler, then tells you to remove it...

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Members’ Q&A: How to administer tests on emulsions for stability?

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In the April Q&A, Tash asked: I like mucking about with things to see if I can break them. I’ve done it previously by deliberately contaminating my emulsified sugar scrub with bread, fish tank water etc to see how well the preservative system held up. So I was interested to read about the freeze-thaw test in the...

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