Not Obsidian - but Bentonite is VERY thirsty - it takes more water than you think it should to make a slurry.
Yes you can pull your water to hydrate your clay as long as you aren't doing a big water discount. I would start with the default water and go from there.
I have seen where people actually strain the clay particles out using a coffee filter so they just get the color, but I never saw the point of it. Like I said, I've never noticed grittiness in my soap.
And yes, I would cut down on the coconut oil a bit if using clay. I would do that before increasing superfat.
FWIW I got my clays at Soap Making Resource.
Originally Posted by RalphTheMastiff
Thank you so much for the info! My soap now tends to be just a hair on the drying side so i may want to adjust my coconut oil down i'm thinking when i use the clay. What are your thoughts?
I love the pictures! I like softer more natural looking colors, I'm not a fan of the bright neon synthetic looks.
What is different with the Bentonite? What makes it a pain?