Sunday, June 7, 2015
Why did my lotion fail?
What is a lotion? (From Back to to the very basics: Lotion making!) A lotion is an emulsified product. It can be an oil in water mixture - meaning there's more water than oil - or a water in oil mixture - meaning there's more oil than water. We generally make oil-in-water emulsions. A lotion must have water, oil, an emulsifier, and a preservative. Without these things, you don't have a lotion.
What do we need for an emulsified product to succeed? (From this post: Emulsification, what's that then?) We need three things - an appropriate emulsifer, heat, and mixing. Without all three, you won't succeed.
We heat and hold our products for 20 minutes at 70˚C/158˚F to ensure they will emulsify well. We mix with a mixer or a stick blender to ensure the product is mixed well. And we use enough of an appropriate emulsifier to ensure the oil and water will come together.
When lotions go wrong!) The oil and water phases are no longer combined, and you'll see that as separation. It could be very subtle, like the bottle in the picture at the top of this post, or it could be dramatic, like the cottage cheese looking product to your left. It could happen right away or it could happen over time.
Join me tomorrow as we take a look at what can happen when we don't use enough or choose the wrong emulsifier.
A slightly more in depth look at emulsification
Emulsifying systems: Polawax, e-wax, and BTMS-50
It's time to make lotion!
Epic lotion fail with Natramulse
A few questions about lotion fails
Question: Why did this lotion fail?
Troubleshooting a lotion fail...
Can I save a failed lotion?