Quote Originally Posted by Stephanie Brim View Post
When I first started dyeing wool, food dyes were what I used. They work on protein fibers, but not plant fibers. Hair = protein. They may stain, but won't actually dye. However, gelatin is made up of protein, among other things, so it may actually dye with the wool/silk dyes...

God, now I'm curious.
If heated afterwards (microwave works, I think), Kool-Aid will dye wool. I have a raspberry beret from the 80's that has raspberry Kool-Aid (and some cherry and blueberry 'cause the color wasn't quite right at first). No idea what Kool-Aid and heat would do to film, though. jnanian? tried that, yet?
Indigo works on just about everything (including the stuff you're not trying to dye).