Why Weight vs Volume Matters When Measuring Cosmetics Ingredients

Today we're going to take a peek at an example of why measuring cosmetics ingredients by volume isn't the best idea.

Ok that was diplomatically put - it's really not a good idea unless you NEVER EVER want to be able to recreate your product.

But I'm guessing that isn't the case.

I'm guessing you DO want to recreate your product.

I mean, you're making fabulous stuff here and your family and friends are raving about your skincare and scrubs and other products and keep asking for more, right?

I thought so.

To be able to recreate any product you have developed, you want to get serious about falling in love with your scale and putting measuring cups, teaspoons, and tablespoons away in the drawer for cooking utensils.

Measuring ingredients by weight helps you get the same result every time.

Here's a little example:

Pictured at the top: 5 grams / 0.18 oz of clay.

With kaolin clay, 5 grams is about a tablespoon in VOLUME
With rhassoul, 5 grams is about a teaspoon in VOLUME

Not the same, is it? That's because kaolin is lighter and 'fluffier' than rhassoul. To makes things more confusing and inaccurate, we could put the kaolin clay into a cup and tap it on the counter. It will settle and reduce in VOLUME, but will still weigh the same.

So, to remove any confusion at all, I made a handy dandy chart right here:

When it is Accurate Enough to Measure Cosmetics Ingredients by Volume

Do Tell

What do you do when you come across a cosmetics product instruction that uses teaspoons and tablespoons?


Ieva said…
Re: What do you do when you come across a cosmetics product instruction that uses teaspoons and tablespoons?

Snort in contempt and close the page XD
If I really, really liked the idea - swear a bit and make the recipe weighting and writing down everything. If the results turn out acceptable I'll be able to recreate them or have a decent starting point for tweaking the recipe.
LisaLise said…
Hi Leva - Yes indeedy - that's the way to solve that one! My immediate thought when I see a 'recipe' with teaspoons and tablespoons is that it will need a complete redo before it can be considered a cosmetic formula.
kkbos said…
Your handy dandy chart isn't showing up. :)
LisaLise said…
Hi kkbos — the handy dandy chart is the picture of the baking cup with the word NEVER written across it :)