Henkel Ag & Company, Kgaa

Lucile Bonnin

Hans Georg Knuebel

Burkhard Mueller

Astrid Kroos

Annika Koenen

Torsten Lechner

Erik Schulze Zur Wiesche

Georg Knuebel

Lars Zuechner

Andreas Kirch

Carsten Brake

Laura Knechtel

Burkhard MÜLLER

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.

Method for determining a greyness level of a strand of hair

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.

Determination of a degree of elongation of hair using a NIR sensor

A method for determination of a cross-manufacturer hair coloration agent recommendation is provide. The method includes the allocation of a number of hair coloration agents to respectively one standard source hair color of a number of source hair colors, a coloration of hair samples with the number of hair coloration agents, a colorimetric measurement of the number of hair samples, a determination of a color difference between each of the number of colors, an allocation of each of the hair coloration agents with unknown composition to one of the hair coloration agents with known composition in such a way that the color difference is minimized, a determination of the user source hair color, a determination of the user's desired hair color, a determination of a first recommended hair coloration agent from the number of hair coloration agents of known composition and of a second recommended hair coloration agent.

Method for determining a cross-manufacturer hair dye recommendation

Devices and methods for determining the thickness of hair are provided. An exemplary device includes a computing unit with a processor and a local memory. The processor is connected to the local memory and configured to read data from and/or to write data into the local memory. The device further includes a user input/output unit configured for interaction with a user. Also, the computing unit includes an image data input interface for receiving image data of at least one individual hair. The image data input interface is connected to the processor. Further, the computing unit includes a user interface connected to the user input/output unit and to the processor. The computing unit is configured to process the image data of the at least one individual hair to create hair thickness values of the at least one individual hair and to output the hair thickness values to the user interface.

Determining the thickness of hair on the head in a damage-free way

The present disclosure relates to an agent (A) for changing the colour of keratin fibres, in particular human hair, which agent comprises unilamellar vesicles (ULV) and/or multilamellar vesicles (MLV) in an aqueous medium, wherein the agent contains at least one C-Cfatty alcohol (a1), at least one ethoxylated fatty alcohol (a2), at least one anionic surfactant of the type of (optionally ethoxylated) fatty alcohol sulfates (a3), and one or more colour-changing salts (a4) from the group of sulfates, hydrogen sulfates, chlorides, and/or bromides in a total amount of from about 0.3 to about 6.0% by weight. The present disclosure further relates to a multi-component packaging unit, in which the aforementioned agent (A) is formulated separate from an oxidant preparation (B). The present disclosure further relates to a method for producing the agent (A).

Hair dye agent having unilamellar and multilamellar vesicles

Oxidative compositions for oxidative treatment of hair, kits including such compositions, and methods for oxidative color change are provided. An exemplary oxidative composition includes comprises water, hydrogen peroxide, at least linear saturated 1-alkanol with from about 12 to about 30 carbon atoms, at least one anionic surfactant selected from alkyl sulfates and alkyl ether sulfates, dipicolinic acid, 1-hydroxyethane-1,1-diphosphonic acid, disodium pyrophosphate, benzoic acid or a salt thereof, and potassium hydroxide. The exemplary oxidative composition has a pH in the range of from about 2 to about 3.8, each measured at 20&#xb0; C. The exemplary oxidative composition includes no phosphoric acid, no salicylic acid, no diethylenetriamine pentaacetic acid, no ethylenediamine tetraacetic acid, no nitrilotriacetic acid nor salts thereof, and no phenacetin, no stannates, no cationic surfactants and no oil.

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Duesseldorf, Germany

Lucile Bonnin