I've found some cool ideas for tie-dying using things like onion skins, avocado pits, and tumeric on pinterest, but when I click to the tutorial there's always something about "now simmer it on the stove for an hour." I'm planning to do natural tie-dying for kids at a bday party, and envision them prepping their shirts with rubber bands, soaking them briefly in a salt or vinegar setting solution, and then plunging them into buckets of natural color, and then going off to swim for a few hours, and collecting their shirts (maybe in a recycled plastic containor full of some of the dye water f they'd like to let it keep soaking longer at home...) at the end of the party.
Any natural dye experienced mamas know if this stove-free process would pan out? Maybe better with some natural dyes than others? I'd be neglecting to simmer the shirts in any sort of mordant/fixative, just a brief soak--any idea which solution would work better faster without heat? Good idea to have kids keep soaking shirts longer at home...? Thanks so much!!!