Mordants are mineral salts that act as the essential bridge between natural dye and fibre — binding colour deeply so it becomes wash-fast, lightfast and long-lasting. Without a mordant, most natural dyes will fade quickly or rinse out entirely. The mordant you choose matters.  Alongside mordants, dye assists play an important supporting role — helping to adjust pH, improve dye uptake, and shift colour depending on the dye plant you're working with. Whether you're just beginning your natural dye journey or stocking a professional textile art studio, you'll find everything you need here — quality mordants and assists for natural dyeing sourced for consistent, beautiful results.