Natural dyeing – Iron dye modifier

Wool, silk, and linen pre-mordanted with oak galls, and then modified with iron

Wool, silk, and linen pre-mordanted with oak galls, and then modified with iron

Iron as a pre-mordant

In all of the natural dyeing I’ve been doing (or hoping to do!) in the last little while, I read a little about using iron as a pre-mordant instead of alum. In Rebecca Burgess’ Harvesting Colour: How to find plants and make natural dyes, she notes that while alum is used for most of recipes in her book, iron is useful in several.

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