Vibrant Acres Colour Farm
 
Packaged Ferrous Sulfate powder. Used as a mordant or colour modifier for all natural fibres (protein/animal or cellulose/plant fibres). Mordanting your fibres is key to successful natural dyeing. A mordant helps the dye to bond to the fibre and will produce richer and more colourfast results.
 
Iron can be used as a mordant on its own, as a mordant in conjunction with alum or other mordants, or as a dye colour modifier. Iron will tend to dark or ‘sadden’ dye colours when added to the dye bath or if dyed goods are added to an iron water bath after being dyed.
 
Too much iron can be harmful to delicate fibres – especially wools, and especially if used with heat. Use in as small a quantity as needed and at as low a temperature as required to achieve the desired results.
 
Weight of Fibre (WOF): Use at 1-3% WOF (A small bag can be used for ~1kg of fibre and a large bag up to to 6kg of fibre)
 
HANDLE WITH CARE: 
Please handle this powder with care. While this is a naturally occurring metal salt that is relatively benign, general precautions are still very important. Wear eye protection, gloves, and a mask when handling. Do not eat, drink, or inhale the powder. Always add dry powder to wet so that it does not splash. Always mix, soak, and store your mordants using containers and utensils that are not afterward used for food. Re-seal the bag after use and store in a cool, dry place.


Used mordant baths are safe to pour down the drain or on the garden in reasonable quantities.