mordant dye

Chrome or mordant dyes produced a muted but very fast color range for woollens.

Chromium salts were until recently extensively used in dying wool with synthetic mordant dyes.

Most natural dyes are mordant dyes and there is therefore a large literature base describing dyeing techniques.

Protein fibres require vat, acid, or indirect/mordant dyes, that require a bonding agent.

Mordant dyes require a mordant, which improves the fastness of the dye against water, light and perspiration.

After steaming, silk goods are normally only washed in hot water, but those printed entirely in mordant dyes will stand soaping, and indeed require it to brighten the colours and soften the material.

The most important mordant dyes are the synthetic mordant dyes, or chrome dyes, used for wool; these comprise some 30% of dyes used for wool, and are especially useful for black and navy shades.