Natural Dyeing Iron (Ferrous Sulphate) Modifier/ Mordant
For use as a Modifier
Commonly used to darken or 'sadden' colours. 1 or 2 teaspoons is sufficient to dramatically change the colour of a dye bath.
For use as a Mordant (fixer)
Always use in small quantities as higher strengths can weaken fibres. Iron as a mordant will greatly improve fibres light and washfastness