Abstract: A method for determining a greyness level of a strand of hair and a system adapted to implement this method are provided. First, an image of the strand of hair representing it according to a predefined representation standard is obtained. The image comprises a portion representing the strand of hair with pixels. Then, for each pixel of the portion, a luminance value is determined. After that an amount of pixels in the portion for which the determined luminance value is above a threshold luminance value is determined. Finally, the greyness level of the strand of hair is determined by estimating a ratio of the determined amount of pixels over a total amount of pixels in the portion.

Abstract: An arrangement for determining a degree of stretching of hair is provided. The arrangement includes a detection unit for detecting hair characteristics and an evaluation unit for evaluating the detected hair characteristics and for determining the degree of elongation of hair based on the detected hair characteristics. The detection unit contains a near-infrared sensor, and is configured to irradiate a hair sample with electromagnetic waves in the infrared range and to detect an absorbance of the hair sample in a wavelength range from about 800 to about 2500 nm. The acquisition unit is configured to generate an absorption spectrum of the hair sample in the wavelength range of from about 800 to about 2500 nm and provide it to the evaluation unit and the evaluation unit is configured to compare the generated absorption spectrum with a calibration model and to determine a degree of elongation of the hair sample.

Abstract: The present disclosure relates to a method for determining a user-specific hair treatment with determination and inclusion of the degree of damage of the hair. To this end, the content of cysteic acid is firstly determined with the aid of near-infrared and/or infrared spectra of the keratin fibres of an individual and a degree of damage is derived via a calibration model. Individual treatment advice is output on the basis of the determined degree of damage.

Abstract: A method for determining a greyness level of a strand of hair and a system adapted to implement this method are provided. First, an image of the strand of hair representing it according to a predefined representation standard is obtained. The image comprises a portion representing the strand of hair with pixels. Then, for each pixel of the portion, a luminance value is determined. After that an amount of pixels in the portion for which the determined luminance value is above a threshold luminance value is determined. Finally, the greyness level of the strand of hair is determined by estimating a ratio of the determined amount of pixels over a total amount of pixels in the portion.

Abstract: A method for determining a coloration product recommendation, in particular a hair coloration product recommendation. First images representing an object colored using a coloration product are obtained. A color of the colored object is identified on the images by determining a global color value taking into account different elements within the image. Then a desired color is obtained. A recommendation for a coloration product to achieve the desired color is determined. The recommended coloration product corresponds to the product which keeps the color difference between the desired color and the identified color below a predetermined threshold.

Abstract: A multi-component packaging unit (kit of parts) for lightening keratinous fibres, in particular human hair, which includes, formulated separately from one another, a first container containing a cosmetic agent (A), and a second container containing a cosmetic agent (B), wherein the agent (A) in the first container contains (a) at least one peroxy compound, for example hydrogen peroxide, and the agent (B) in the second container contains (b) at least one acid with formula (I): Also, a method for lightening hair, in which the multi-component packaging unit as contemplated herein is used.

Abstract: An arrangement for determining a degree of stretching of hair is provided. The arrangement includes a detection unit for detecting hair characteristics and an evaluation unit for evaluating the detected hair characteristics and for determining the degree of elongation of hair based on the detected hair characteristics. The detection unit contains a near-infrared sensor, and is configured to irradiate a hair sample with electromagnetic waves in the infrared range and to detect an absorbance of the hair sample in a wavelength range from about 800 to about 2500 nm. The acquisition unit is configured to generate an absorption spectrum of the hair sample in the wavelength range of from about 800 to about 2500 nm and provide it to the evaluation unit and the evaluation unit is configured to compare the generated absorption spectrum with a calibration model and to determine a degree of elongation of the hair sample.

Abstract: A method for determining a degree of damage to hair is provided in the form of various embodiments. Said method can comprise the following steps: during the exposure of a hair sample to UV light (for example by employing a UV-LED), detecting fluorescence light emitted by the hair sample, determining a fluorescence intensity by employing the detected light, and determining the degree of damage to the hair using said fluorescence intensity.

Abstract: A method, usage and kit-of-parts for decolorizing human keratin fibers, which were colored with oxidation dyes and/or partially-oxidizing dyes, comprising the application of an agent to the dyed keratin fibers, which contains in a cosmetic carrier at least one compound of the Formula (I) wherein X denotes a bivalent organic radical of the Formula (II) or a direct bond,

Abstract: A multi-component packaging unit (kit of parts) for lightening keratinous fibres, in particular human hair, which includes, formulated separately from one another, a first container containing a cosmetic agent (A), and a second container containing a cosmetic agent (B), wherein the agent (A) in the first container contains (a) at least one peroxy compound, for example hydrogen peroxide, and the agent (B) in the second container contains (b) at least one acid with formula (I): Also, a method for lightening hair, in which the multi-component packaging unit as contemplated herein is used.

Abstract: The present disclosure relates to agents for the oxidative coloring of keratinic fibers, which are characterized in hat they contain derivatives of anisole as novel developer molecules.

Abstract: The subject matter of the present disclosure are agents for stabilizing keratin fibers, more particularly human hair, containing in a cosmetic carrier: (a) at least one compound of the formula (I) wherein X denotes oxygen (—O—), sulfur (—S—) or a grouping —NR5—.

Abstract: A method for determining a degree of damage to hair is provided in the form of various embodiments. Said method can comprise the following steps: during the exposure of a hair sample to UV light (for example by employing a UV-LED), detecting fluorescence light emitted by the hair sample, determining a fluorescence intensity by employing the detected light, and determining the degree of damage to the hair using said fluorescence intensity.

Abstract: The present disclosure relates to agents for dyeing keratin fibers, in particular human hair, containing, in a cosmetic carrier (a) at least one direct dye of formula (I), wherein Y1, Y2 independently represent a nitrogen atom or a group C—R9, and Q represents a special linker group of formula (II), (III), (IV) or (V), (b) at least one anionic surfactant and/or at least one cationic surfactant.

Abstract: The disclosure relates to agents for dyeing keratin fibers, in particular human hair, containing, in a cosmetic carrier (a) at least one direct dye of formula (I), wherein Het1, Het2 represent cationic heterocycles; R1, R3 respectively represent a substitute which is not hydrogen, and Q represents a grouping of formula (VIII), (IX), or (X).

Abstract: The present disclosure relates to a method for determining a user-specific hair treatment with determination and inclusion of the degree of damage of the hair. To this end, the content of cysteic acid is firstly determined with the aid of near-infrared and/or infrared spectra of the keratin fibres of an individual and a degree of damage is derived via a calibration model. Individual treatment advice is output on the basis of the determined degree of damage.

Abstract: The present disclosure relates to agents for the oxidative coloring of keratinic fibers, which are characterized in hat they contain derivatives of anisole as novel developer molecules.

Abstract: The subject matter of the present disclosure includes agents for lightening keratin fibers, more particularly human hair, containing in a cosmetic carrier: (a) at least one carboxylic acid ester of the formula (I) (b) at least one peroxide compound, and (c) water, wherein the agent has a pH value in the range of from about 7.5 to about 12.5. A further subject matter of the present disclosure includes a kit-of-parts in which the aforementioned components exist packed separately in two agents (A) and (B).

Abstract: A method, usage and kit-of-parts for decolorizing human keratin fibers, which were colored with oxidation dyes and/or partially-oxidizing dyes, comprising the application of an agent to the dyed keratin fibers, which contains in a cosmetic carrier at least one compound of the Formula (I) wherein X denotes a bivalent organic radical of the Formula (II) or a direct bond,

Abstract: The subject matter of the present disclosure are agents for stabilizing keratin fibers, more particularly human hair, containing in a cosmetic carrier: (a) at least one compound of the formula (I) wherein X denotes oxygen (—O—), sulfur (—S—) or a grouping —NR5—.