Alum - Aluminium Sulphate
Alum - Aluminium Sulphate
Alum - Aluminium Sulphate
Alum - Aluminium Sulphate

Alum - Aluminium Sulphate

Alum - Aluminium Sulphate

Aluminium Sulphate, commonly known as Alum, is a staple mordant used in the preparation of fabrics for natural dyeing. It helps dyes bond securely to the fibre, improving colour vibrancy and fastness while keeping the natural hand of the fabric intact. Perfect for use on cellulose and protein fibres, this high-grade alum is ideal for cotton, linen, silk, and wool applications alike.

Used as a pre-dye bath, it ensures that natural dyes such as madder, cochineal, and logwood achieve brighter and longer-lasting shades. Kraftkolour’s Alum dissolves easily in warm water, offering consistent and reliable performance for both small-scale craft dyeing and professional textile studios.

Benefits

Alum is the cornerstone of mordanting — dependable, easy to use, and essential for clean, strong dye results. It improves the brightness and longevity of natural dye projects without altering the feel of the fabric.

Perfect For:

  • Natural dyeing with plant-based or insect-derived dyes
  • Fibre preparation for home or studio projects
  • Workshops and professional textile design use
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SIZE
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  • 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

Pre-wash fabric to remove finishes or oils. Use gloves when handling. Always dissolve fully before adding fabric to avoid streaks or residue. Store in an airtight container in a cool, dry place.

Resources

Natural Dyes and Mordanting Instructions

Online orders are sent using Australia Post during business hours Monday to Friday. Orders are usually sent 1-2 days after your order is placed or when a pre-ordered item arrives. We email shipping confirmation with tracking information when your order is dispatched.

Shipping : Australia

Shipping is calculated at checkout according to the weight of the order, and your address location.

Most orders will have the option of:

  • Australia Post Standard Shipping (estimated delivery in 3-5 days)
  • Australia Post Express Shipping (estimated delivery in 2-3 days)

Kraftkolour cannot guarantee expected delivery times.

Kraftkolour may use other carriers from time to time for bulky or heavy shipments.

Shipping : International

We currently ship outside Australia to many countries using Australia Post’s International Express service. Rates will be automatically calculated at checkout.

Click & Collect : Thomastown

When ordering online you can choose 'Click & Collect' for order collection at our premises at 2/99 Heyington Ave, Thomastown, Victoria. We will email you confirming when your order is ready to collect.

Orders can be collected 10am 4pm Monday to Friday and we would appreciate it if you could collect your order within a week.

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