Considering the effect of different combinations of oils & butters in a basic lotion

Let’s take some time today to see how this all comes together in choosing butters and oils for our lotions! Defining some scientific terms: Solubility, viscosity, surface tension, and interfaces Defining some scientific terms: Contact angle, wetting, refractive index, and specific gravity Defining some cosmetic chemistry terms: Spreadability, play time, cushion, drag, and melt point...

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Why is the cosmetic formulator concerned with solubility, viscosity, surface tension, contact angles, wetting, refractive index, specific gravity, spreadability, play time, cushion, drag, and melting point?

I thought we’d take some time to process what we’ve learned over the last few days about these very interesting concepts by considering some emollient combinations. Defining some scientific terms: Solubility, viscosity, surface tension, and interfaces Defining some scientific terms: Contact angle, wetting, refractive index, and specific gravity Defining some cosmetic chemistry terms: Spreadability, play...

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Defining some cosmetic chemistry terms: Spreadability, play time, cushion, drag, and melt point

Let’s spend a little more time getting to know some formulating terms and concepts! Check out these posts from Saturday and Sunday… Defining some scientific terms: Solubility, viscosity, surface tension, and interfaces Defining some scientific terms: Contact angle, wetting, refractive index, and specific gravity As we work through these definitions, think about how these ingredients...

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Defining some scientific terms: Contact angle, wetting, refractive index, and specific gravity

Yesterday, we took a look at some concepts we’ll need when discussing silicones, esters, and thickeners for surfactants. Today, let’s take a look at a few more. Contact angle: “The contact angle is defined as the angle the water makes with the surface. In this illustration, a low contact angle (θ<90 ̊) means the surface...

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Defining some scientific terms: Solubility, viscosity, surface tension, and interfaces

I’ve been trying to write some posts on silicones, surfactant thickeners, and esters for quite a while now, and I keep running into the issue that I need to define a bunch of terms before I can start. As I have a question from someone from the May Q&A that hasn’t been answered yet, I...

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Weekend Wonderings: Definitions for products?

In this post, Why did I buy this and what can I do with it? Foaming bath butter, N. Bax asks: Please, will you go through what the textual and other differences are for the following body moisturizers :Milk-up to 90% water, super thin lotionLotion-up to 70% water, Crème-up to 10% water, very thick “lotion” w/1...

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