The results were interesting. On the left is wool, which is the easiest natural fiber to dye--this was white when I started. Cotton takes natural dye with difficulty and the lace in the middle, which is cotton, only got a slight distressed look. There are two other types of lace that appear a little darker but the dying wasn't very successful on them either. On the far right is silk, which as an animal fiber takes natural dyes well. It went from almost white to champagne.
All in all, if I do this again, I'll have to invest in more paraphenalia for better results!