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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Natural dyeing – Oak Galls

Green oak galls

Green oak galls

I’ve read about oak galls and their place in dyeing and ink-making a little, and didn’t think too much of them – I don’t really think of oak trees in Calgary (compared to trips to Louisiana!) but while out for a walk (playing PokemonGo!) I noticed that one of the parks near me had cute little (young) oak trees. A closer look… and there were the weird clustered balls.

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