As amazed as I am by the numerous responses... I ended up going with dendritic salt as a "medium" for my scents. In case anybody in the future searches for something similar and needs help.
If I wanted to be able to add scent and package up bath salts as soon as the scent was added, what would be the best way? I was thinking using a dropper, then closing them up, but I was afraid they'd clump all up. Could I maybe pre-scent some powder (arrowroot or similar) let it dry, then...
what wetting/bonding agent are you using? I use oil, because it doesn't activate the acid/sodium bicarbonate mixture. If you go with oil, use an emulsifier to prevent from breaking a neck with a slick tub.
I use micas from the conservatorie. IMHO, if your tub stains, then I think it's more your tub than anything. If it's porous, then it'll stain pretty much no matter what you use.
What all are you using? It looks like you have some larger grains of something in there. As for the flat bottoms, you can either find containers that will fit the bombs and then use some padding. I used to crumple a paper towel, then lay another over top so I didn't get any wrinkles from the...
I've been doing a bastille goat milk for eons, but I'm slowly transitioning over to a recipe with cocoa butter and silk. I love my bastille, but no matter how long it cures, it dissolves VERY quickly in the shower.
Lindy, glad to hear of another weirdo! I was grooming out a friend's angora rabbit before breeding and it hit me... if I can make silk soap, why not angora? It worked well, and she gave me a bag of the shorter and knottier fiber that I had groomed out. :)
Milk bath as in real milk? I'd say that if you have something that is holding the microbial growth at bay with milk, then you'll be just fine with chamomile powder. Heat and hold after it's mixed in well. If it's not a viscous product, it'll probably end up at the bottom, but a gentle shake...
I use the micas. The 80mm bath bombs with a lot of colorant don't color the water or stain the tub. Of course, I do have a soaker tub, but still, it doesn't provide any hue at all to the water.
I put the order in! I'll let everybody know when they ship and when it arrives. Then I'll update everybody as their packages go out. Thank you, everybody, for such a smooth co-op and for sharing in the excitement. Yep, I'm a weirdo, I'm excited for everybody else as well, LOL.