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Iron Mordant | Iron Fixer | Ferrous Sulfate | Green Vitriol | Ferrous Sulphate | Natural Dying | Mordant Dying | Botanical Dying

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Price:$5.00+

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Highlights

  • Sourced by AuroraSilk
  • Supplies for making crafts

  • Materials: ferrous sulfate

Called “green vitriol” in old dye books, this is an essential of the dyer’s art. Iron after baths can take any yellow or gold and turn it to a soft green. Reds become burgundies, pinks become plums, and any tannin source (any weed or bark) can be used to make pretty greys, just by adding iron.

Usually used as an after-mordant modifier, where you just watch the colour and when it has changed “to taste”, rinse it. If used as a pre-mordant, ½ oz per pound is the usual ratio = 3%. Do not use too much as it can “weight” and damage delicate fibres.

  • Order today to get by Nov 4-16
  • Returns & exchanges accepted within 30 days
  • Cost to ship: $10.20
  • Ships from: Portland, OR

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Reviews for this item

5.0

We calculate this number using a recency-weighted average of all ratings, with a rating's value decreasing by half each year to best reflect the current experience.

(10 reviews)

5.0 Item quality
5.0 Shipping
5.0 Customer service
100% Buyers recommend
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5 out of 5 stars 5 This item

Jae Sep 11, 2026

Perfect for what I needed it for and well priced.

Jae Sep 11, 2026

5 out of 5 stars 5 This item

Rachel May 19, 2026

I'm going to use this for making oak gall ink. I haven't made it yet, but I'm sure the product will work well.

Rachel May 19, 2026

5 out of 5 stars 5 This item

Michelle May 29, 2025

Well packaged, high quality ingredients.

Michelle May 29, 2025

5 out of 5 stars 5 This item

Will Nov 13, 2020

Cheryl is a legendary force of natural dyeing and has a holistic approach for all of the products that Aurora Silk has to offer. 100% Organic and Fair-Trade. Keep your colors natural - that's where the real magic happens!

Will Nov 13, 2020

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Listed on Oct 20, 2026
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