In order to make your soaps whiter you will need to add titanium dioxide. Titanium dioxide is a natural pigment sourced from rutile, anatase, and brookite minerals. To make your soap colors brighter you can add the titanium dioxide to the soap base before adding in the colorant.
Titanium dioxide mainly comes in a powdered form and needs to be diluted before mixing the soap making ingredients. There are a couple of ways to add the titanium dioxide which mainly depends on which type of titanium dioxide you are using.
If you are using the water dispersable titanium dioxide you will need to add it to water. In soap making you will add it to your lye water solution.
If you are using the oil dispersable titanium dioxide you can add it to your soap making oils and mix in the pigment using the stick blender. This will help break up the powdered pigment so that it will disperse into the oils.
The main reason for dispersing the titanium dioxide in either water or oil is that if the powdered titanium dioxide is added directly to the soap making base it most likely won’t disperse well and there will be white clumps and streaks in your soap when you go to cut it after unmolding it.
If you are interested in purchasing titanium dioxide you can purchase it from the following suppliers: