These are all oven hot process soaps made with the jojoba wax recipe. In the picture the first bar on the left is from a batch in which I mixed the titanium dioxide diluted in small amount of water after the cook.
Then I wanted to have a more even color and made another batch where I added it in the oils before mixing in the lye solution. I was a bit worried if it would speed up the trace, but that didn't happen.
I wanted to compare the result with some natural colorant. I had read from several sources that also Kaolin clay gives white color. The one on the right has Kaolin clay added before the cook. The color is not even close to white! It is tan or maybe even beige and after it cured it actually became even darker. I wonder if there are different qualities of Kaolin that would produce different tones. Also, the weirdest thing happened, the batch with Kaolin came out really soft. I have no idea why!