Mordant - Aluminium Sulphate

Aluminium Sulphate, commonly known as Alum, is one of the most widely used mordants in natural dyeing. It prepares fibres so that dyes bond securely, resulting in brighter colours and improved wash fastness while maintaining the natural softness of the material. Suitable for both cellulose fibres (such as cotton and linen) and protein fibres (such as wool and silk), alum is typically used as a pre-dye treatment. It allows natural dyes like madder, cochineal and logwood to develop clearer, more vibrant and longer-lasting shades.

This high-quality alum dissolves easily in warm water, ensuring consistent and reliable results across a wide range of dyeing methods. Its ease of use and dependable performance make it a staple in both home dyeing and professional textile studios.

Benefits

• Improves dye bonding for stronger, longer-lasting colour
• Enhances brightness and clarity of natural dyes
• Suitable for both plant and protein fibres
• Maintains the natural handle of the fabric
• Easy to dissolve and use reliably

Perfect For

• Natural dyeing with plant-based or insect-derived dyes
• Preparing fibres for home or studio dye projects
• Workshops and professional textile design applications

Technical

• High-purity aluminium sulphate in fine crystalline form
• Prepares natural fibres for dye uptake and permanent bonding
• Compatible with cotton, linen, silk, and wool fabrics
• Dissolve in hot water and immerse fabric before dyeing
  
• Rinse gently and dry before applying colour