The present invention provides a hair straightening composition with improved ease of use, which leads to an enhanced smoothness of the straightened hair. The composition comprises at least one carboxylic acid of the formula (I) in combination with at least one quaternary ammonium compound having two long-chain hydrocarbon groups: RCOCOOH Formula (I). In further aspects, the present invention concerns a process for semi-permanent straightening of the hair, utilizing said composition, the use of the composition for straightening hair, and a kit comprising the composition and a straightening iron.

The present invention provides a hair straightening composition with improved ease of use, which leads to an enhanced smoothness of the straightened hair. The composition comprises at least one carboxylic acid of the formula (I) in combination with at least one quaternary ammonium compound having two long-chain hydrocarbon groups: RCOCOOH Formula (I). In further aspects, the present invention concerns a process for semi-permanent straightening of the hair, utilizing said composition, the use of the composition for straightening hair, and a kit comprising the composition and a straightening iron.

The present invention teaches a hair straightening system including formulations that will safely and effectively straighten curly hair for at least 2-3 months after a single application, despite frequent washings of the hair. Methods for obtaining said formulations are disclosed. Hair straightening systems including shampoo and one or more conditioners are also provided.

The present invention teaches a hair straightening system including formulations that will safely and effectively straighten curly hair for at least 2-3 months after a single application, despite frequent washings of the hair. Methods for obtaining said formulations are disclosed. Hair straightening systems including shampoo and one or more conditioners are also provided.

The disclosure notably relates to a computer-implemented method for selecting a chemical compound applicable on a class of human hairs. The method comprises obtaining a database storing data relative to chemical compounds. For each compound the data comprises an identifier, an ingredient and a performance score. The method also comprises obtaining assessed hair properties and hair target properties. The method also comprises computing at least one goal score and a manageability goal score from the assessed hair properties and hair target properties. The method also comprises determining at least one identifier in the database satisfying the computed goal score and the computed manageability goal score. The satisfying comprises minimizing a distance function between the computed goal score and a corresponding goal score and maximizing a fit-to-manageability function between the computed manageability goal score and the corresponding manageability score. The method also comprises outputting the determined at least one identifier.

The disclosure notably relates to a computer-implemented method for selecting a chemical compound applicable on a class of human hairs. The method comprises obtaining a database storing data relative to chemical compounds. For each compound the data comprises an identifier, an ingredient and a performance score. The method also comprises obtaining assessed hair properties and hair target properties. The method also comprises computing at least one goal score and a manageability goal score from the assessed hair properties and hair target properties. The method also comprises determining at least one identifier in the database satisfying the computed goal score and the computed manageability goal score. The satisfying comprises minimizing a distance function between the computed goal score and a corresponding goal score and maximizing a fit-to-manageability function between the computed manageability goal score and the corresponding manageability score. The method also comprises outputting the determined at least one identifier.

A multicomponent packaging unit (kit of parts) for permanently changing the shape of keratinic fibers, in particular human hair, comprises the following packaged separately from one another: a container (i) containing a cosmetic agent (A), and a container (ii) containing a cosmetic agent (B),
where agent (A) in container (i) contains at least one keratin-reducing compound, and agent (B) in container (ii) contains at least one compound of general formula (I)

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Also provides a method of using the kit and of using Bunte salts of formula (I) on hair.

A multicomponent packaging unit (kit of parts) for permanently changing the shape of keratinic fibers, in particular human hair, comprises the following packaged separately from one another: a container (i) containing a cosmetic agent (A), and a container (ii) containing a cosmetic agent (B),
where agent (A) in container (i) contains at least one keratin-reducing compound, and agent (B) in container (ii) contains at least one compound of general formula (I)

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Also provides a method of using the kit and of using Bunte salts of formula (I) on hair.

A hair product application device for dispensing a hair product composition directly from a glove. The hair product application device generally includes a glove having at least one blister pack containing a hair product composition. The blister pack includes a pocket that holds the hair product composition and is at least partially in contact with an exterior surface of the glove. The pocket has a rupturable membrane and optionally, a backing sheet that is located at least partially on the exterior surface of the glove. The hair product composition is released by rupturing the rupturable membrane of the blister pack by applying an external pressure to the exterior surface of the rupturable membrane or an internal pressure to the pocket using a pneumatic device.

A hair product application device for dispensing a hair product composition directly from a glove. The hair product application device generally includes a glove having at least one blister pack containing a hair product composition. The blister pack includes a pocket that holds the hair product composition and is at least partially in contact with an exterior surface of the glove. The pocket has a rupturable membrane and optionally, a backing sheet that is located at least partially on the exterior surface of the glove. The hair product composition is released by rupturing the rupturable membrane of the blister pack by applying an external pressure to the exterior surface of the rupturable membrane or an internal pressure to the pocket using a pneumatic device.