There is described a method for colouring hair, said method comprising treating hair with a composition comprising dihydroxyacetone (DHA), in free form or in salt form; optionally drying the hair; and heating the treated hair, including the applied DHA composition, to a temperature of from about 100° C. to about 250° C.

There is described a method for colouring hair, said method comprising treating hair with a composition comprising dihydroxyacetone (DHA), in free form or in salt form; optionally drying the hair; and heating the treated hair, including the applied DHA composition, to a temperature of from about 100° C. to about 250° C.

A hair styling appliance includes a handle, a first barrel extending from the handle, a second barrel extending from the handle, the first barrel and the second barrel being disposed in a first plane and being non-moveable with respect to one another, and a third barrel extending from the handle, the third barrel being disposed in a second plane spaced above the first plane. The third barrel is hingedly connected to the handle and moveable between a closed position and an open position.

A hair styling appliance includes a handle, a first barrel extending from the handle, a second barrel extending from the handle, the first barrel and the second barrel being disposed in a first plane and being non-moveable with respect to one another, and a third barrel extending from the handle, the third barrel being disposed in a second plane spaced above the first plane. The third barrel is hingedly connected to the handle and moveable between a closed position and an open position.

A hairstyling apparatus is described which includes a barrel that acts as a hairstyling surface and a central longitudinal axis. The barrel has a first proximal end and a second distal end. A heating element is in thermal communication with the barrel. A rotating member located at the proximal end of the barrel and configured to rotate around the central axis of the barrel, the rotating member including at least one tab extending along a longitudinal length of the hairstyling surface over at least a portion of a longitudinally extending portion of the hairstyling surface. Further, at least one hairstyling element received in said at least one tab.

A hairstyling apparatus is described which includes a barrel that acts as a hairstyling surface and a central longitudinal axis. The barrel has a first proximal end and a second distal end. A heating element is in thermal communication with the barrel. A rotating member located at the proximal end of the barrel and configured to rotate around the central axis of the barrel, the rotating member including at least one tab extending along a longitudinal length of the hairstyling surface over at least a portion of a longitudinally extending portion of the hairstyling surface. Further, at least one hairstyling element received in said at least one tab.

A hair heating device is presented, which provides a solution to the problem of allowing a person to move around while heat conditioning one's hair. The heating cap has a heating element embedded in the cap with a layer of heat distributing insulation between the heating element and the head of the user, and a pocket in the cap to hold a battery pack to power the heating element. Generally speaking, the components are configured as follows: the hair cap has the heating element internally attached between a first layer of fabric and a second layer of fabric. The battery pack is detachably connected through an inside pocket of the heating cap to the heating element. The heating cap provides an improved way to heat conditioning hair (which helps produce healthier and shinier hair) while utilizing the heat generated by the battery and allowing the user to move about freely.

In one aspect the invention is arranged to provide a hair treatment apparatus adapted to reduce the temperature of hair. This apparatus includes at least one thermal energy storage core arranged to draw heat out of hair wherein said at least one thermal energy storage core is arranged to cool hair to a temperature below 0° Celsius.

In one aspect the invention is arranged to provide a hair treatment apparatus adapted to reduce the temperature of hair. This apparatus includes at least one thermal energy storage core arranged to draw heat out of hair wherein said at least one thermal energy storage core is arranged to cool hair to a temperature below 0° Celsius.

A method for treating the hair with the aid of a treatment device, notably a heat treatment device, in particular a straightening device, in which a lock of hair is exposed, while the device is being moved along the latter, in a single operation to: apply cosmetic composition with the aid of an application member of the device, and then to apply steam with the aid of a steam outlet of the device that is offset relative to the application member in the direction of movement of the lock of hair by a nonzero distance v, measured between the median plane of the steam outlet and the median plane of the application member, of less than or equal to 10 mm.