The invention relates to a cosmetic composition for hair, containing at least one compound containing at least three carbodiimide groups built according to formula (I), R.sup.4—[R.sup.1—N═C═N].sub.n—R.sup.5 (I), where n is a whole number between 3 and 100, and R.sup.1, R.sup.4 and R.sup.5 each stand, independently of one another, for linear or branched, aliphatic or cycloaliphatic, optionally substituted groups with 1 to 100 C-atoms. The invention also relates to uses of the cosmetic composition for hair, and to a method and the application thereof.

Method for treating hair comprising the application onto hair of polymeric layer(s) which can removed to a large extent or even totally in an easy manner upon request of the user by using oxidizing composition.

Oxidation dyeing process using a substrate bearing at least one oxidation dye, several preservatives and an oxidizing aqueous composition The present invention relates to a process for the oxidation dyeing of keratin fibres, in particular human keratin fibres such as the hair, comprising a step of application, to said keratin fibres, i) of a substrate comprising on its surface one or more oxidation dyes, one or more thiolated reducing agents and one or more organic reducing agents of reductone type, and a step of application, to said keratin fibres, ii) of an oxidizing aqueous composition comprising one or more oxidizing agents. The present invention also relates to a process for preparing said substrate. The invention also relates to an element in sheet form, pretreated by a composition comprising one or more oxidation dyes, one or more thiolated reducing agents, and one or more organic reducing agents of reductone type.

A system, computer readable medium and method for selective brightening of hair, the method may include or may be preceded by applying at least one photosensitive material to the hair. The method may also include forming at least one pattern of brightened hair by illuminating the hair by at least one pattern of illumination.

A portable hair printer includes a communication module, a printer module that performs a printing operation, a memory that stores a program for printing an image on a surface of a bundle of hairs, and a processor that executes the program, wherein the program is executed by the processor, receives an image to be dyed on the bundle of hairs from the user terminal through the communication module, and transmits the received image to the printer module to perform an image printing operation for the bundle of hairs, and the portable hair printer further comprises a housing having the communication module, the printer module, the memory, and the processor embedded therein, and the housing includes an upper housing and a lower housing hinged to each other around a hinge, and a sensor module.

The invention relates to the field of hairdressing, and more particularly to methods of coloring. The technical result of the proposed method is the maximum preservation of the quality of the hair with any kind of lightening and with any correction of the root area. A variety of variants of the offered method of coloring with the separation of hair into sections, taking into account the anatomical points of the head, according to the schemes rhombus, square, triangle, horseshoe is necessary in order to adapt the coloring process to a specific effect, which depends on the type of haircut and the length of hair. The technical result is achieved by the fact that the method of coloring is taken out by blowing hair layers from a strand with a hairdryer, while making up a hair coloring scheme consisting of sections constructed based on the anatomical points of the head.

The present invention relates to the field of lightening keratin fibres and more particularly to the field of lightening the hair. The present invention relates to a process for lightening keratin fibres, in particular human keratin fibres such as the hair, which consists in using on the said fibres i) a substrate comprising on its surface one or more chemical oxidizing agents preferably in solid form, and ii) an aqueous composition preferably comprising one or more chemical oxidizing agents. The present invention also relates to a process for preparing the said substrate thus pretreated.

A portable hair printer includes a communication module, a printer module that performs a printing operation, a memory that stores a program for printing an image on a surface of a bundle of hairs, and a processor that executes the program, wherein the program is executed by the processor, receives an image to be dyed on the bundle of hairs from the user terminal through the communication module, and transmits the received image to the printer module to perform an image printing operation for the bundle of hairs, and the portable hair printer further comprises a housing having the communication module, the printer module, the memory, and the processor embedded therein, and the housing includes an upper housing and a lower housing hinged to each other around a hinge.

A product and process for making a transitorily colored sombre hair extension that creates a natural looking sombre effect. The hair extension comprises a hair bundle consisting of a plurality of hair strands having varied lengths. The hair is colored a first color, the bundle realigned, so that the ends of the hair strands are varied in length at the top portion. Then the top half of the hair bundle is color processed to a second color. Again, the strands are realigned and the varied length hair ends are returned to the tail portion. This results in a sombre colored hair extension with a mid-section of the hair bundle that contains transitorily colored hair with a blend of the first color in the top portion of the hair bundle with the second color in the tail portion of the hair bundle.

The present invention relates to a hair colouring tool which can be used for creating coloured patterns or designs in the hair in an extremely accurate and efficient way. The pattern or design is achieved by dying and bleaching so that the patterned areas are either darker or lighter than the natural hair colour.