I have just written an article for the latest 'Embellish'magazine (Issue 18) on the early history of mordant printing in conjunction with natural dyes. It was fascinating to discover that the Egyptians used mordants from the 12th Dynasty (2055-1650 BC) and that alum was used in India around 2000 BC. The advantages of applying mordants and resists to a cloth before dyeing enables a polychrome palette to exist alongside areas of undyed cloth with only one or two dyebaths. I will be teaching this process at the Geelong Fibre Forumin September-October this year. I believe there are only one or two places left in my workshop, so if you are interested, get in quick!