was "Dissolvable casting model material?"
Okay, John, I'll bite.
This is my favorite, and actually might be useful to someone on the
list. Great for dyeing your own jewelry cords in wondrous and unusual
Cord and ribbons here:
But if you'd just like to play, and end up with a gorgeous scarf,
you can start with a kit:
Albion, CA, US
PS: Dharma is also a great source for true washing soda.