Setting the Dye in Yarn Once You've Knit the Sweater
I didn't set the yarn in a sweater I just finished using cotton yarn because the skeins were already in balls when I got them. Does anyone have a fool-proof way to do this.
I know they are supposed to be colorfast, but they have bled in the past and I would rather not take a risk.
I know there's a vinegar trick, but what is it? does it work with multiple colors?
Surprisingly, it is difficult to get an answer via Google. Thank you for any and all ideas!