Alum Mordant

Specialist Crafts Alum Mordant is a preparation treatment used to help natural dyes and marbling colours bond more effectively to fabrics and paper. Acting as a mordant, it improves the adhesion of colour, resulting in brighter, longer-lasting results during natural dyeing and decorative surface techniques.

For natural dyeing, alum is dissolved in water and used to pre-treat fibres before applying plant-based or other natural dyes, helping the material absorb and retain colour more successfully. It is also widely used in paper marbling, where treating paper with an alum solution improves the transfer and adhesion of marbling paints to produce crisp, vibrant patterns.

Suitable for a range of textile, printmaking and craft applications, it is an essential material for anyone exploring traditional dyeing and marbling techniques. Supplied in a 500g container.

Please note: Irritant. Always use appropriate protective equipment and follow the safety instructions provided during handling and preparation.