thicker foot cream with stearic acid we made last week...)
A lot of the ingredients are the same as they were for the body scrub on Friday, but we're using them in slightly different amounts and adding a few others to make the product more moisturizing for our lovely feet! (Take a peek at that post if the ingredient that interests you isn't explained in detail here.)
We've upped the amount of stearic acid to make this bar hard and resilent when used with our feet. It'll still be lovely and moisturizing, but we want it to be able to scrub a lot harder than the body scrub bar without breaking. I'm reducing the hard butter to make up for that change.
As an aside, I wouldn't use kokum in this bar as it will be very very hard and won't glide over your feet well. I include it as an option as some people might like that feeling, but I certainly didn't. I definitely suggest cocoa or mango butter!
I'm adding wax to this bar to make it stay on our feet longer. I have found that 4% beeswax with 10% stearic acid can be a bit draggy, but it definitely makes the moisturizing oils and butters feel like they're on my feet longer, so I include them. If you really hate the feeling of wax, leave it out and include more oil. (If you want to use a different wax, please see the notes beside the beeswax entry.)
As an aside, I really didn't notice a difference in skin feel when I used babassu in these bars, so I suggest leaving it out and using the less expensive coconut or shea butter instead.
When it comes to oils, I recommend thick, greasy feeling ones to increase the feeling of moisturization. You can choose any ones you like, but this is where I like to use olive oil for all those moisturizing and softening fatty acids.
physical exfoliants you wish, but this is my favourite combination. I use it at 100% of the bar, so I make 100 grams of the bar base, then add 80 grams of pumice and 20 grams of baking soda, mix well, and glop into the molds.
SOLID SCRUB BAR FOR THE FEET WITH STEARIC ACID
46.5% cocoa, mango, or kokum butter
20% shea, coconut, or babassu oil
12% oils - heavier oils like avocado, castor, or olive oil are great here
10% stearic acid
5% emulsifier of some sort - Incroquat BTMS-50 or 25, Polawax, e-wax, etc.
4% beeswax or soy wax or 2% candellia or carnuaba wax
1% Phenonip or other heat tolerant preservative
COOL DOWN PHASE
1% fragrance or essential oil (I recommend peppermint) or 3% menthol crystals (not heat sensitive)
0.5% Vitamin E (if you are using oils with less than 6 months' shelf life)
(This recipe doesn't add up to 100% if you change the wax.)
Add up to 100% pumice (or 80% pumice, 20% baking soda)
Melt everything except the fragrance/essential oil and Vitamin E in a heat proof container in a double boiler until all the ingredients are well melted. Remove from the heat and add the fragrance/essential oil and Vitamin E (optional), and mix well. (Maybe 20 seconds.) Then add your exfoliant and mix well. Then pour into a mold and put in the fridge or freezer until set. Let sit for 24 hours before using, or it can fall apart. It can take up to 24 hours for stearic acid to completely harden.
Can you colour these bars? Yes, you can. You have to use an oil soluble colour, like those powdered ones you could find for chocolate making, not a water soluble one like food colouring or our LabColours. I've made them green before, but I stopped because I kinda like the colour it is now.
Other posts in this series:
One ingredient, five products: Stearic acid
One ingredient, five products: Stearic acid - a hand lotion
One ingredient, five products: Stearic acid - foot cream
One ingredient, five products: Stearic acid - body scrub bars
Join me tomorrow as we make shampoo bars with stearic acid!