Iron as a Mordant
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Iron as a Dye Mordant

Iron used as a mordant improves light- and wash-fastness of most dyes, and particularly logwood. According to Liles, iron mordant produces quite beautiful results with cochineal; iron and madder make Egyptian purple, violet and brown; whilst iron, tannin and madder are used in India for greys, blacks and purples.

It is best to use iron mordant only on cellulose fibres like cotton and linen as too much iron can damage wool. Buy iron (ferrous sulphate) here.

You will need:

  • 2 to 5 grams of iron salts
  • 100 grams of cotton fabric
  • 8 to 10 litres of water

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Last updated on 21 October 2019
Website & photos by Mike Roberts ©2006-19 Wild Colours natural dyes