Iron Sulphate, also known as Ferrous Sulphate, is a traditional mordant and colour modifier used to darken and “sadden” natural dyes. It’s often used to achieve greys, blacks, and muted earthy tones or to strengthen the lightfastness of natural dye colours.
We offer this in two formats - granules and powder. Please note the powder is very
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did what it was supposed to do in the dye application I got it for