Heart & Industry

Home · Wingham Wool Work

Mordant - Aluminium Sulphate

Mordant - Aluminium Sulphate

Wingham Wool Work

£5.8

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

Wingham Wool Work's own words, read from their page.

Buy from WINGHAM WOOL WORK LIMITEDWINGHAM WOOL WORK LIMITED is a UK retailer, not the maker. Out of stock. Price seen 2026-09-26. Not an affiliate link, we earn nothing from it.

Where this comes from

The part other shops don't tell you. Three separate questions, kept separate on purpose, each with its source.