Reply from Bramble Berry
Hi Sara! I'm so glad your soap turned out so beautiful using this Black Oxide Pigment! Though, I'm sorry i's rubbing off onto your hands so much. In our tests and recipes we found 1/16-1/8 tsp per pound of melt and pour soap colored the soap perfectly without washing off onto our skin or washcloths. When a soap is colored in high concentration the colorant can definitely run off the soap! You can always melt down your soap and add more uncolored base to keep this from happening. I will email you personally to help troubleshoot!