FR2984086A1 - Method for treating hair for coloring or discoloring wick, involves treating and protecting complete parts of wick by treated unit and protection unit, respectively, and repeating hair composition application process for hair of wick - Google Patents

Abstract

The method involves applying a hair composition (C) on a hair of a wick (M) for dyeing or bleaching the hair and obtaining colored or bleached hair layers. The complete parts of the wick are treated by a treated unit (30) and protected by a protection unit. The hair composition application process is repeated for another hair of the wick. The protection unit is provided in form of a pulverulent i.e. fibrous composition, where average size of the particles in the pulverulent composition preferably lies between 5 and 500 micrometer. An independent claim is also included for a cosmetic assembly for treating hair of a wick.

Description

The present invention relates to hair treatment methods. BACKGROUND A hair composition, in particular coloring or fading, applied to a portion of the hair, may be transferred to the rest of the hair. This phenomenon of transfer can produce a result perceived as unsightly by the user and requires in practice the hairdresser to keep away the lock treated as a risk of transfer remains or to accept that a certain transfer occurs in making sure that it is not too visible. There is, therefore, a need for a hair treatment process to limit the transfer of a hair composition applied to the hair. The invention aims to answer them. SUMMARY According to a first of its aspects, the present invention relates to a hair treatment method, comprising the successive steps of: - applying to a hair or several hair strands a hair coloring or bleaching composition in order to obtain a coloration or deColoring the hair in gradation, - applying on all or part of the or wicks thus treated a means of protection to prevent a transfer of the composition on the rest of the hair, - possibly repeat the operation to treat d ' other locks, while one or more previously treated locks are thus protected. The invention can thus advantageously make it possible to reduce the transfer of the hair composition to other areas of the hair. The work of the hairdresser is facilitated, since it can, without transfer notch on other hair, rest the treated lock. This can protect the creation of one. coloring or gradual discoloration on the lock of hair coated with the protection.

The present invention may, in addition, advantageously allow to shorten the duration of the treatment of the hair. By "coloring or fading - in gradation", it is necessary to understand a coloring or discoloration of hair delimited by at least two distinct color zones, the hair thus colored or discolored may have one or more colorimetric coordinates chosen from - L, C ' `, h, a, and b which vary continuously between these two areas. The coloring or fading of protected haze can comprise first and second regions having between them a zE color difference in the CIE Lab space greater than or equal to 1, in particular to 3. The protection means can be applied manually. possibly using, as detailed below, an applicator, the latter may comprise a hair guide system and / or also ensure the distribution of the hair composition. The protection means may come into contact with the present hair composition deposit. . on the wick. The protective means may be immiscible with the hair composition to which it is applied. The protection means can be eliminated by. washing, rinsing, rubbing and / or hair dryer. In an example of. In one embodiment, the method may comprise the successive steps of: applying to a first lock of hair a hair coloring or bleaching composition in order to obtain a coloration or bleaching of the hair in gradation, - - to apply to all or. part of the first bit thus treated a means of protection for preventing a transfer of the composition to the rest of the hair, applying on a second lock of hair a hair coloring or bleaching composition in particular. to obtain a coloring or discoloration - hair gradient.

Thus, the method according to the invention can relate to a sequential treatment of locks of hair, a lock coated with hair composition being covered by the protective means before application of a hair composition on a second lock, for example during a session at the hairdresser.

Alternatively, the method according to the invention may comprise the successive steps of: - simultaneously applying on a plurality of strands of hair at least one hair coloring or bleaching composition in order to obtain a coloration or discoloration of the hair in gradation, applying on all or part of the locks thus treated a means of protection making it possible to prevent the transfer of the composition (s) applied. Thus, in one exemplary embodiment, the invention relates to a simultaneous treatment of several locks of hair, and possibly the simultaneous application on several locks of hair, individualized, a means of protection, which may be or not common to all the locks. The simultaneous application of the composition (s) on a plurality of locks of hair may, for example, be carried out by an applicator comprising a hair guidance system, in particular a comb defining a plurality of treatment spaces at the same time. in which the wicks to be treated are intended to be inserted. The applicator may further be configured to dispense the protection means on the wicks receiving the hair composition (s). This means of protection is for example a powdery composition or a film, as indicated above. Independently or in combination with the foregoing, the method according to the invention may comprise the steps of: - positioning, in a guide system of the applicator, the hair strand (s) to be treated, - moving along of the wick (s) to be treated the applicator while distributing on said wick or at least one hair coloring or discoloration composition, - apply, during the movement of the applicator; at the level of the areas on which the one or more compositions have been applied, a means of protection for preventing a transfer of the applied composition (s). According to another of its aspects, the present invention relates to a cosmetic assembly, in particular for the implementation of a method according to the invention as defined above, comprising: a hair coloring or decolouration composition, and - a means for in the form of a sheet element and / or a protective means in the form of a powdery composition, in particular a fibrous composition. The average size of the particles constituting the powdery composition may especially be between 1 μm and 10 mm, better still 1 μm and 3 mm, preferably between 5 and 500 μm. Such a size avoids the transfer and facilitates handling by the hairdresser. By "average size" is meant the statistical particle size dimension at half of the population; said D (0.5). The sheet element may comprise, in particular, a plastic material, in particular a thermoplastic material, a paper, a metal, in particular aluminum, a woven fabric, a cellulose nonwoven or one of its derivatives or a polamid, in particular polyamide 6.6. The assembly may be configured so that the hair composition is not in contact with the sheet member prior to application of the composition to the hair. The hair composition and the protective means may be housed in separate compartments of the assembly according to the invention. The assembly may comprise an applicator for applying the protection means, as well as possibly the composition. The assembly may further include an applicator for applying the protection means, said applicator comprising in particular a hair guidance system and / or a reservoir for containing the hair composition. DESCRIPTION OF THE DRAWINGS The invention will be better understood on reading the detailed description - which will follow, of examples of non-limiting implementation thereof, and on examining the appended drawing, in which: FIGS. 1 and 2 show schematic and partial longitudinal sections of hair strands treated by methods according to the invention; FIG. 3 is a section on III-III of FIG. 2, and FIG. , schematically and. partially, an example of device for applying the protection means according to the invention, and and FIG. 5 is a schematic and partial representation of a variant of 10. device for applying the protection means according to the invention. In the figures, the real proportions do not. not always been observed, for the sake of clarity of the drawing. FIG. 1 shows a lock M of hair treated by an exemplary method. According to the invention. In this example, a deposit of coloring or discoloration is carried out in the wick M, in order to obtain a coloration or discoloration of the hair in gradation. It is thus possible to apply a deposit of composition - C. the formulation of which varies along the wick. Composition C comprises, for example; a mix . of two hair dyes, the relative proportions within said mixture vary continuously along the wick M. It can still be deposited. a quantity of composition C varying strictly monotonically along the wick in order to obtain a coloration or discoloration of the hair in gradation. A coating 20 of a powdery composition P is applied to the deposit 10 of composition C. This coating constitutes a composition of the composition. means of protection according to the invention and reduces the risk of accidental transfer of the composition C on other hair, if the wick is rested. The coating 20 is preferably sufficiently dense to interpose between the lock thus treated and the other hair; at least during the period of time one remains. risk of transfer, for example until the drying, rinsing or neutralization of the activity of the composition C. The pulverulent composition P may consist of small fibers where appropriate.

Preferably, the particles of the powder composition are inert to the hair composition, i.e. do not react chemically with the hair composition. The particles may be of vegetable or mineral origin. Preferably, the particles are insoluble in the hair composition. Preferably, the particles are little or not water soluble. Talc, nacres, grain starch can be used, among other materials. The powdery composition P can be applied to the composition deposition C by any means known to those skilled in the art, in particular dusting or spraying. The spraying may be easier to perform, but the powdery composition may be applied by brush or houpette, among other techniques. Thus, the application of the powdery composition P can be manual, the user sprinkling the powdery composition P at the level of the deposit 10 of composition C on the wick (s) treated (s). The number per unit area of particles of the composition. deposited powder may vary as one moves along the treated wick, M. This amount can vary strictly monotonically when moving along the wick M. Alternatively, it can be substantially FIG. 2 shows a variant embodiment in which a lock M of hair is covered with a deposit 10 of composition C in order to obtain a coloration or discoloration of the hair in gradation, on which is then applied a sheet element 30 constituting a means of protection. The sheet member 30 may be wrapped around the wick M as shown in FIG. 3, defining an outer wrapper E extending around the wick M 25 and thereby forming a tubular sheath in which the wick M is present. The sheet member 30 may have first and second regions to be contacted during wrapping around the wick M, at least one of two regions having an adhesive zone. This will close the sheet element on itself. The adhesive zone may be obtained, if appropriate, after physical or chemical activation, for example after subjecting the sheet element to heating and / or radiation of a particular wavelength.

FIG. 4 shows a device. applicator 35 in the form of a handpiece, for applying a protective means, for example a P - film or a film, to protect. the other hair with respect to a transfer of the composition The device 35 may comprise, where appropriate, a reservoir or compartment in which the means of protection, in particular the powdery composition P, is stored. The device 35 comprises a gripping portion 36 by which the user holds the device during the treatment of the lock of hair M. The lock M to be treated, previously coated with a depot of hair composition (not shown) capable of producing a coloring or bleaching of the hair in gradation, for example is inserted at a through opening 37 defining a treatment space within the device 35, from which the protective means is applied, - -. The device 35 is then moved relative to the bit M during the application of the protection means. The protective means is for example a powder which is applied at the opening of the device 35 traversed by the wick, over the entire periphery thereof. -. Several passages can be made along the same wick M, for example by increasing the quantity of powdery composition deposited when the means of protection is in this form. The device 35 can be made to allow only the application of the protection means. As a variant, the device 35 can allow both the application of a coloring or bleaching hair composition capable of producing a coloration or discoloration of the degraded hair and of the means of protection: The capillary composition and the protection means may be effected during the same passage along the same wick of the device 35. For example, the device comprises two treatment zones, one of which is carried out in one region. application of the composition, the other where is deposited the means of protection. Alternatively, the treatment is in two steps.

In a first step, the wick M is inserted at the opening 37: The device 35 will then, during a first pass along the wick M, apply the hair composition. In a second step, the device 35 makes a second pass and applies the protection means, for example in the form of a powdery composition P, to the capillary composition deposit in order to prevent the transfer of the latter. In an alternative embodiment, the device 35 delivers the protection means in the form of a thermoplastic sheath. The sheath can be formed and rolled up. The device can deliver a gradual coloring 0 by going from the tip to the root by stretching the sheath: At the end, the device opens in order to be able to remove it from the root. Alternatively, the sheath is left and the apparatus is moved from the root to the tip. The hair wick passes through an opening, where it can receive the composition and be coated with the protective film. EXAMPLES EXAMPLE 1 An entire head test is carried out. A lock is treated with a hair composition, for example a bleaching agent, in order to obtain a gradual bleaching of the hair. Before resting the wick to treat another, the wick is sprinkled from root to tip with a powder of wheat flour. We put 5 g per wick, We do all the locks, with sheath or powder, we wait and then we rinse. There is no contamination of one wick on the other whereas a test without the application of flour causes problems of transfer. EXAMPLE 2 The method used is shown in FIG. An apparatus capable of delivering a color (not shown) into a U-shaped tube 40 in which a wick (not shown) is. placed. The device 30 makes it possible to obtain a gradient hair coloring. The same device delivers in addition a plastic film 41 which closes the U as one moves forward.

The plastic 41 adheres to the U-tube 40, for example because the edges 42 of the U-shaped casing 40 are adhesive. Non-illustrated variants of implementation of the invention may combine characteristics from the various embodiments which have just been described. The phrase "with one" should be understood as synonymous. - of 'comprising at least one'. The expression "understood between" must be understood as inclusive limits.

Claims (15)

REVENDICATIONS1. A method of hair treatment, comprising the successive steps of: applying to one or more locks (M) of hair a hair coloring composition (C) or discoloration to obtain a coloration or discoloration of the hair in a gradient, all or part of the wick (s) (M) thus treated means (P; 30; 41) of protection to prevent a transfer of the composition 10 (C) to the rest of the hair; possibly repeat the operation to treat wick alites (M) while one or more wicks (M) previously treated are-. thus protected. 2. Method according to claim 1, the protection means (P) being in the form of a powdery composition, especially fibrous. 15 3. Method according to the preceding claim, the average particle size constituting the powdery composition (P) being between 1 gin and 10 mm, better lptrn and 3mm, preferably between 5 and 500 gril. 4. Method according to claim 1, the protection means (30; 41) being in the form of a sheet element. 20 5. Method according to claim 4, the sheet element (30; 41) comprising, in particular consisting of a plastic material, in particular thermoplastic, a paper, a metal, in particular aluminum, a woven, a nonwoven cellulose or a derivative thereof or polyamide 6,6. 6. Method according to any one of the preceding claims, the protection means (P; 30; 41) coming into contact with the capillary composition deposit (C) present on the wick (s) (M). 7. Method according to any one of the preceding claims, the protection means (P; 30; 41) being immiscible with the composition (C) capillary on which it is applied. 30 8. Method according to any one of the preceding claims, the protection means (P; 30; 41) being applied to a plurality of locks (M) of hair each coated with a hair coloring composition (C) or discoloration. 9. Process according to any one of claims 1 to 8, the means. (P 30; 41) of protection being applied manually 10. A method according to any one of claims 1 to 8, the means (P; 30; 41) of protection being applied using an applicator (35), the latter comprising a hair guiding system and / or distributing the hair composition (C) intended to be covered by said protection means (P; 30; 41): 11. Method according to any one of the preceding claims, the protection means (30) defining, once applied to the hair composition, an outer envelope (E) extending in all or part around the wick (M) on when it is applied, said means (30) of. protection defining in particular a sheath in which the. wick (M) is present. 12. A method according to any one of the preceding claims, the means of preparation (P; 30; 41) being removed by washing, rinsing, rubbing and / or hair drying: 13. The process according to any one of the preceding claims, la. composition (C) being applied simultaneously to a plurality of locks (M) of hair, as well as possibly to the protection means (P; 30; -41). 14. Cosmetic assembly for carrying out the process according to any one of the preceding claims. comprising: a hair coloring or decolorization composition (C); and. a screening means in the form of a sheet element (30; 41) or a protective means in the form of a pulverulent (P) composition, especially a fibrous composition; - the average particle size constituting the powder composition (P); ) Being in particular between 1 μm and 10 mm, preferably between 5 and 500 μm, or the sheet element (30; 41) comprising in particular, for example consisting of a plastic material, in particular thermoplastic, a paper, a metal, in particular aluminum, a woven fabric, a cellulose nonwoven or one of its derivatives or polyamide 6,6. 30 15. The assembly of claim 14, further comprising an applicator (35) for applying the protection means, said applicator comprising in particular a hair guidance system and / or a reservoir for containing the composition (C).