melody wrote: Heat helps speed up the process. You can even microwave them, but I've never done that with cottons. I've microwaved tons of silk scarves, but those use acid dyes. (the dye isn't acid, you use an acid like vinegar to help set it) The fiber-reactive procion dye works on all natural fiber, but the acid dye only works on natural fiber with a protein base. (wool and silk) I like acid dye on silk...the colors are vibrant and intense.
Here's some of my silk scarves, they sell these in the Quilt Museum Gift Shop...these are my 'supernova series'