Calcium Carbonate
Calcium Carbonate is also known as chalk. It is a common assistant to harden water and hence deepen the colour of natural dyes such as madder and weld. It is also used to fix an aluminum acetate mordant or a ferrous mordant.
In preparation for the potential Canada Post strike we are upgrading your shipments to the best courier available. Please use a residential address for Canadian delivery as P.O. boxes in Canada are not accepted. Thank you for your understanding.