Iron can be used as a modifier or a mordant. It can be used on all fibers and makes colors darker in tone. It also increases lightfastness and washfastness of the dyed project. 

Iron Sulfate

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$1.95 USD $1.76 USD
$2.15 USD $1.94 USD
$2.60 USD $2.34 USD
$4.00 USD $3.60 USD
$5.75 USD $5.18 USD