unmordanted

These can be dyed in medium or light shades on to unmordanted cotton from a bath containing alum, and in the ordinary method of dyeing the addition of alum is beneficial, as tending to result in the production of deep shades.

The Dyeing of Cotton Fabrics A Practical Handbook for the Dyer and Student Franklin Beech

They may be combined with logwood, as they will dye with equal facility on mordanted and unmordanted wool.

The Dyeing of Woollen Fabrics Franklin Beech

-- This method is used in applying the now large and increasing group of azo dye-stuffs, which are characterised by being able to dye unmordanted cotton from a simple boiling bath.

The Dyeing of Woollen Fabrics Franklin Beech