Hi,
Is it possible to dye cotton with naturasl dyes without using a mordant?

Jill Goodwin give a list in her book, A Dyer's Manual (second edition). She writes, "Some natural dyestuffs will dye cotton direct without a mordant, including turmeric, safflower flowers, and barberry bark." Turmeric produces an orange-yellow without a mordant, while safflower and barberry bark both produce yellows.