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How to mordant

HOW TO MORDANT FIBERS, YARNS, FABRICS AND CLOTHES

INTRODUCTION

Natural dyes are obtained from natural sources and dye only 100% natural materials, animal and plant fibers as wool, silk, cotton, linen. They are not recommended for synthetic materials.

They can be used for dyeing fibers, yarns, fabrics, clothes and textile products.

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.

IN DEPTH

HOW TO MORDANT ANIMAL FIBERS (SILK, WOOL)

HOW TO MORDANT PLANTS FIBERS (COTTON, LINEN…)