Ferrous sulphate is a mordant and a modifier. Known since ancient times as copperas and as green vitriol. It will improve wash- and light fastness on any fabric. Use in low percentages so not to damage the fibres, more than 2%WOF can make protein fibres brittle.


Ferrous Sulphate is called 'the sad mordant' because it tends to darken the colours. Use with weld for moss greens, with cochineal for dark purples, and with madder for burgundy reds.


Ferrous Sulphate will create blacks and grays when used with Black Tannin.


It is recommended to have a look at the different dye instruction modules available here.


-Securely packed in a re-sealable zip bag for easy use and storage

-Comes with dye recipe.


View safety data sheet here

Ferrous Sulphate (Iron)

  • Storage

    Keep in a tightly closed container, stored in a cool, dry, ventilated area. Protect against physical damage. Maintain a constant temperature not to exceed 24° C. (75° F.).  Containers of this material may be hazardous when empty since they retain product residues (dust, solids); observe all warnings and precautions listed for the product.

    Heath and Safety

    Do not ingest. Do not breathe dust. Wear protective gloves, safety goggles and a dust mask when handling fine dye powders and mordants.


    Environmental Hazards

    Natural dye powders are no environmental concern. Mordants and mordanted dye baths should be disposed in a sensible way according to your local waste disposal laws.

  • Packaging

    Natural dyes and mordants are shipped in a special packaging made from recypcled materials with a re-usable zipper. All materials come with an information sheet.

    Your pouches are shipped in either a flat padded envelope or a cardboard box depending on quantity and size.


    Shipping rates.

    Shipping is according to a flat rate; packages up to 100 grams are shipped with registered mail with a tracking number but is untrackable once it leaves the borders of Israel.


    Packages 100- 500 grams are automatically upgraded to priority shipping called ECO post which is fast, reliable and trackable via the website of Israel Postal Services.


    You will see your total shipping rate in your order.

    At this moment it is not possible to ship your dye materials by EMS.