laughingrat posting in naturaldyes
OK--I know you can do this cause I've seen the results, but unfortunately, a lot of the stuff I see on using red onions shows a brownish color resulting. One site mentioned using vinegar as the mordant in order to draw out the green, but something about that sounds fishy, so I thought I'd ask around here: anyone use red onion skins to get green? What mordant/process did you use? Any cautions, such as "Hey, don't boil that, it'll turn brown" and similar?