The invention also concerns the dyeing compositions containing them, particularly cosmetic compositions for direct hair dyeing, and the corresponding dyeing method.

The subject of the present invention is the use, for dyeing in particular human keratin materials, of a direct dye, in particular an azo dye, by dry thermal transfer.

The invention concerns the use of a direct red colouring agent derived from alizarin, 3-phenylsulphonyl-1,2-dihydroxyanthraquinone for direct or oxidation dyeing of keratinous fibres.

The invention concerns the use of a polycyclic direct colouring agent for direct or oxidation dyeing of keratinous fibres.

The use of said compounds in the above-mentioned fields, cosmetic compositions containing such compounds, and a method for directly dyeing keratin fibres, are also disclosed.

This compound may be used for directly dyeing hair to give blue through purplish blue shades which are wash-fast, light-fast, weatherproof and sweat resistant.

First the garment
is dyed with an acid based (nylon) or direct/ reactive (natural ber) dye.

The composition may form part of a kit with an aqueous composition comprising an oxidising agent such as hydrogen peroxide and optionally a third composition comprising conditioning agent and/or direct dye.