WHY TO MORDANT
Before dyeing with natural dyes you need to prepare the materials with a mordanting process.
The mordanting process prepare the fibers to permanently bond with natural dye.
The most common mordants are mineral salts and they are used to fix the dye color to the fibers.
The procedure consist in soaking the fibers/yarns/fabrics in a mordanting bath.
The amount of mordant to use for each bath is calculated based off a percentage of the weight of the dry fibers/yarn/fabrics.
The recommended mordant for animal fibers as silk, wool, alpaca and cashmere is “potassium alum”. We suggest an amount of 25% of the weight of the dry fibers/yarn/fabric.
For plant fibers as cotton, linen, bamboo we recommend “potassium alum” and “sodium carbonate”. We suggest an amount of 20% of the weight of the dry fibers/yarns/fabrics for “potassium alum” and 10% of the weight of the dry fibers/yarns/fabrics for “sodium carbonate”.
For your safety we suggest to wear dusk mask, gloves and apron during the making, to keep separately the dyes stuff and the kitchen utensils and to keep kids and animals away from the working area.
HOW TO MORDANT ANIMAL FIBERS (SILK, WOOL)
HOW TO MORDANT PLANTS FIBERS (COTTON, LINEN…)