1/2teaspoonMica powder(total! add less if batch is divided into different colours)
Instructions
Step 1: Find what you need
Gather your supplies and materials.
Step 2: Make bath bomb mixture
Add 1 cup of baking soda, 1/2 cup of citric acid, 1/2 cup of Epsom salts, and 3/4 cup of cornstarch to a large bowl. Stir together until mixed well.
Slowly pour in 3 Tablespoons of sweet almond oil.
Add 10 to 20 drops of essential oil into the mixture.
Stir this mixture together well, removing as many clumps as possible.
The mixture will appear dry, but should stick together if you pick it up and squeeze it together.
Step 3: Add Colour
If you want multiple colours of bath bombs, divide the mixture into several smaller bowls.Add about 1/8 teaspoon of mica powder into each bowl and mix well.
We divided our mixture into 4 bowls so we could have 4 colours.The more pigment you add, the brighter the colours will be.
Step 4: Form bath bombs
Spoon the mixture into one half of the mold. You can use one colour, or several. Use the back of a spoon or your fingers to press the mixture into the mold.
When the mold is full, press down on the mixture to pack it in tight.
Add another scoop on top of the packed mixture so that it's heaping out over the mold (don't pack it down).
Repeat with second half of mold.
Press the halves of the mold together carefully. Turn each half back and forth slightly while firmly pressing them together, allowing any extra mixture to fall out.
Carefully pull the molds apart. If the bath bomb isn't coming out easily, gently tap the outside of the mold with a spoon.
Unmold the second half of the bath bomb in the same way.
Let bath bomb dry on a baking tray (or other dry surface) overnight.