Red cabbage--great indicator, not-so-great dyestuff.
iirc, it turns cloth to a sort of purply lint color, like the white underwear you didn't sort out from the new red shirt and, later, the new blue jeans. This was on cotton.
But if you've got any leftover cabbage juice & some scraps of fabric, try it out for yourself.
I wouldn't recommend trying a garment for the first go with even commercial dyestuff.
Ann in CT
> Subject: Re: Re: onionskin dyeing
> So after making lots of red cabbage juice for a classroom
> science lab this morning, and given the onion skin dyeing
> thread... I have to ask...
> Red cabbage --- period or not? What else would you add, not
> knowing much about dyeing (mordant is the word I'm looking
> for, I think)? What color does it end up? Maybe someday I
> might make red cabbage juice for fun and not work!