Here are 4 Natural Dyes you can use without the need of a mordant. Most natural dyes really need a good mordanting, either aluminium-based mordants, copper, ferrous sulfate or tanning using a tannin-rich plant material. Mordanting is important to improve the light- and wash fastness of your textiles and it intensifies the color outcome on your fabric. Some natural dyes have enough tannin to be light- and wash fast without the assistance of alum, or iron. These are called substantive dyes. I have
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