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Shop natural mordants online at Classic Fabrics

Classic Fabrics offers a refined selection of natural mordants to get started with the hand-dyeing of your fabrics. In our selection you will find, among others, alum and iron sulphate. Our natural mordants and pickling agents come from a responsible source and are mined responsibly.

What is a mordant and why you need it for natural dyeing

To be successful in natural dyeing you need to know something a little about mordants and fixatives. The bottom line is that natural dyes will not bind to natural fibres without the use of a mordant or fixative. Although you will initially get a nice result from dyeing, it will quickly wash out or fade! Alum is one of the most popular mordants used in natural dyeing, because you can dye and mordant at the same time. Simply add the alum to the dye bath, mix well, and then add yarn or fibre. Alum is also considered the safest mordant, so it is probably the best choice if you are just starting out. Iron (or Ferrosulphate) tends to darken the colour of your fabric. Use it to make beautiful shades of brown. We recommend 15 grams of iron per 500 grams of fabric.

Questions about our mordants?

We understand that you might have some questions about our Mordants. If you have questions about the stock or the delivery time of a product, do not hesitate to contact us. We will be happy to help you. But you can also contact our customer service if you want some advice before you buy our Mordants. Either way, we are here to help. You can reach us via e-mail, our Live Chat or by phone. And of course you’re always welcome to come and have a look around in our shop (on weekdays). We do ask you to make an appointment in advance via our customer service.