Calcium Carbonate (Chalk)
1 - 100g jar of Calcium Carbonate
25g of Calcium Carbonate will mordant approximately 500 grams (1.1 pounds) of fiber
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Calcium carbonate is also referred to as chalk. This dense, white powdery mineral is a common addition to the madder dye bath to deepen shades and is one of the principle minerals that create hard water.