The present invention relates to a process for curl-relaxing and/or straightening keratin fibres, such as the hair, which comprises the application to the fibres of one or more compositions comprising reducing agents, one or more compositions comprising organic solvents and a step of heat treatment of the fibres by means of a heating tool. The invention also relates to the use of the composition(s) comprising reducing agents and of the composition(s) comprising organic solvents in a process for curl-relaxing and/or straightening keratin fibres. Finally, the invention relates to a multi-compartment device or “kit” that is suitable for performing such a process.

The applicator for applying a haircare product comprises a base 12 and spikes 14 protruding with respect to the base. At least a plurality of spikes 14 each have a cross section of elongate shape in at least one direction of extension. At least some of the spikes of said plurality of spikes are made at least partially of porous material that is able to absorb said haircare product.

The invention relates to a device for treating the hair and to the corresponding application method, the device (2) comprising: —two arms (5, 6) that are able to move relative to one another between a moved-together configuration for treating the hair and a spaced-apart configuration for inserting hair to be treated between said arms, and —a system (18) for applying a product, comprising an applicator member (26) for applying the product, the application system (18) being mounted on one of the arms (5) and being able to move relative to said arm (5) between at least two positions generating, while the device (2) is being used to treat the hair, different respective application pressures of the applicator member (26) on the hair to be treated.

Disclosed are hair styling compositions comprising at least two latex polymers chosen from acrylate and polyurethane polymers, wherein at least one latex polymer is a film-forming polymer. Methods of styling the hair are also disclosed.

The invention relates to a device for treating the hair and to the corresponding application method, the device (2) comprising: —two arms (5, 6) that are able to move relative to one another between a moved-together configuration for treating the hair and a spaced-apart configuration for inserting hair to be treated between said arms, and —a system (18) for applying a product, comprising an applicator member (26) for applying the product, the application system (18) being mounted on one of the arms (5) and being able to move relative to said arm (5) between at least two positions generating, while the device (2) is being used to treat the hair, different respective application pressures of the applicator member (26) on the hair to be treated.

The invention relates to a cosmetic product refill for a device for treating hair, which includes at least one heating element, the cosmetic product refill including a rib or groove for fastening the refill to the device and a cosmetic product applicator element in the form of a sheet, such that the rib or groove is designed to fasten the cosmetic product refill to the device for treating the hair in such a way that a part of the cosmetic product refill is offset laterally with respect to the heating element(s), and such that at least one portion of the applicator element is designed to extend next to the heating element(s). The invention also relates to a device for treating the hair including such a refill.

Disclosed are hair styling compositions comprising at least two latex polyurethane polymers, wherein at least one latex polyurethane polymer is a film-forming polymer. Methods of styling the hair are also disclosed.

Disclosed are hair styling compositions comprising at least two latex polymers chosen from acrylate and polyurethane polymers, wherein at least one latex polymer is a film-forming polymer, and at least one component chosen from coalescing agents and plasticizers. Methods of styling the hair are also disclosed.

Disclosed are hair styling compositions comprising at least two latex acrylate polymers, wherein at least one latex acrylate polymer is a film-forming polymer, and at least one component chosen from coalescing agents and plasticizers. Methods of styling the hair are also disclosed.

Disclosed are hair styling compositions comprising at least two latex polyurethane polymers, wherein at least one latex polyurethane polymer is a film-forming polymer, and at least one component chosen from coalescing agents and plasticizers. Methods of styling the hair are also disclosed.