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Iron Mordant for Natural Dyeing

8 oz., ferrous sulfate, Copperas

Enough to mordant 10 pounds of dry fiber.
Iron mordant is a metallic salt used to treat fibers to make natural dyes color fast.
Iron will darken colors.
Use 1/2 oz. iron mordant per pound of dry fiber.
Refer to a natural dye book for more details.
As with all mordants do not use in food utensils, use in a well ventilated area, wear protective clothing, dispose of properly, follow safety instructions on back of package.

Item purchased is bag of Iron mordant in picture.

If you need more than the quantity listed, please contact us.

To view more of our products, you can visit our Etsy Shop Main Page at :

If sent to a Pennsylvania address, Pennsylvania sales tax applies.

United States $4.75 USD - alone
$2.25 USD - with another item
Brush Creek Wool Works

Iron Mordant for Natural Dyeing


  • Material: ferrous sulfate
  • Only ships within United States.
  • Feedback: 1132 reviews
  • Favorited by: 37 people