I love the swirls... I rarely do pretty soaps now as i want people to use the soap rather than just have it sitting around the bathroom looking nice :roll::grin:
So i went for layers with indigo and charcoal. I used 20% water discount and 5% superfat. After doing some maths, I made one batch of oils and added 4/5 to a lye solution with indigo powder and 1/5 to a plain lye solution. Then i divided the indigo batch into 4 and added different amounts of charcoal (suspended in a little water) with the last batch having no charcoal to show the colour of just the indigo. So the bottom layer has the most charcoal, next has a bit less, next has a bit less, next has only indigo, and the top layer no colour added.
I quite like the subtle blue grey but i can't seem to avoid indigo streaks and it's still a bit soft despite the 20%wd and sitting in my airing cupboard for nearly two months! Feel free to leave it a while longer if you like.