Alum Mordant Solution for Tannin-Treated Plant Fiber

An alum mordant solution can be used on tannin-treated plant fiber before, after or during the dye process to create a brighter color.

The Handbook of Natural Plant Dyes Book Cover
“The Handbook of Natural Plant Dyes” by Sasha Duerr is full of helpful tips and recipes for home dyeing enthusiasts.
Cover courtesy Timber Press