Process for producing a cosmetic composition

Abstract

A process for producing a cosmetic composition that includes step a) inkjet printing onto a basic cosmetic composition, using an inkjet printer, at least one fluid composition in an amount chosen so as to impregnate the basic composition over only a part of its thickness, and step b), after at least one sampling of the impregnated layer, repeating step a) while optionally modifying the fluid composition inkjet-printed.

Claims

1. A process for producing a cosmetic composition, comprising the following steps: a) inkjet printing onto a basic cosmetic composition, using an inkjet printer, at least one fluid composition in an amount chosen so as to impregnate the basic composition over only a part of its thickness, b) removing at least a part of the impregnated layer, c) after removing the at least part of the impregnated layer, repeating step a) while optionally modifying the fluid composition inkjet-printed.

2. The process according to claim 1, wherein the amount of the fluid composition printed in step a) is greater than or equal to 5 mg/cm.sup.2.

3. The process according to claim 1, wherein the fluid composition is an ink.

4. The process according to claim 3, wherein the printing is polychrome printing.

5. The process according to claim 3, wherein the colour of the fluid composition printed in step a) is different from the colour printed in step c).

6. The process according to claim 1, wherein the fluid composition comprises at least one compound chosen from the group consisting of cosmetic and dermatological active agents, the compound being contained in the fluid composition in a weight concentration of between 0.1% and 40%, relative to the total weight of the fluid composition.

7. The process according to claim 6, wherein the fluid composition further comprises a visible marker that is either a dye or a fluorescent agent, the marker becoming invisible after application to human keratin materials, the process further comprising detecting the marker present in the cosmetic composition after step b) and determining the amount of fluid composition remaining on the basic cosmetic composition.

8. The process according to claim 1, the printing being carried out in step a) according to a number n of printing passes that is between 1 and 10.

9. The process according to claim 1, further comprising storing the identity of the printed fluid composition from step a) in an electronic memory.

10. The process according to claim 9, wherein step c) comprises printing the fluid composition whose identity has been stored.

11. The process according to claim 1, the printing being carried out according to information entered by a user or measured on said user's skin.

12. The process according to claim 1, wherein the basic composition is a foundation or a lipstick.

13. The process according to claim 1, further comprising generating information about the depletion of the impregnated layer caused by step b).

14. The process according to claim 1, further comprising identifying the surface portion(s) of the basic composition where the impregnated layer is at least partially exhausted and storing the resulting information in an electronic memory.

15. The process according to claim 14, wherein the printing in step c) only impregnates said surface portion(s).

16. A process for making up human keratin materials comprising producing a cosmetic composition in accordance with step a) of the process as defined in claim 1, performing step b) of the process as defined in claim 1 and applying the at least part of the impregnated layer to the keratin materials, and performing step c) of the process as defined in claim 1.

17. The process according to claim 16, wherein the colour of the fluid composition printed in step a) is different from the colour printed in step c).

18. The process according to claim 16, wherein the colour of the fluid composition printed in step a) is the same as the colour printed in step c), further comprising printing the fluid composition of step c) in an amount greater than the amount initially printed in step a).

19. The process according to claim 6, wherein the at least one compound is chosen from the group consisting of fragrances, UV-screening agents, moisturizers, binders, and mixtures thereof.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) The invention may be better understood with the following reading of non-limiting implementation examples thereof, and with examination of the attached drawing, in which:

(2) FIG. 1 diagrammatically represents various steps of an example of a process in accordance with the invention,

(3) FIG. 2 diagrammatically represents various steps of another example of a process in accordance with the invention, and

(4) FIG. 3 is a photograph partially showing a cross-section of the basic composition after printing according to the process in accordance with the invention.

DETAILED DESCRIPTION

(5) As illustrated in FIG. 1, an example of a process for producing a cosmetic composition in accordance with the invention comprises a first step 1 consisting in printing at least one fluid composition onto a basic cosmetic composition so as to form an impregnated layer, over only part of the thickness of the basic composition. The fluid composition is for example an ink. Then, in a second step 2, at least one sample is taken, until at least partial wear of the impregnated layer. There may be one or more samplings, depending on the amount sampled by the user at each sampling and depending on the thickness of the impregnated layer.

(6) In a third step 3, the user repeats step 1 with the same fluid composition, in particular the same ink. After sampling of step 2, step 3 can be repeated.

(7) In the example of FIG. 2, in which another example of a process according to the invention is illustrated, the first and second steps 1 and 2 are the same. The final step referenced 4 differs in that a different fluid composition, for example an ink of different colour, is printed onto the basic composition. Steps 4 and 2 can be successively repeated, for example each time with a new colour of ink that is printed.

(8) Test for Measuring the Thickness of the Layer Impregnated with Fluid Composition

(9) After carrying out the printing according to step a) of the process according to the invention, the cosmetic composition impregnated with fluid composition is left to dry for 24 hours. A transverse section is cut in the block of the cosmetic composition using a knife. One of the two halves is freed and a photograph of the slice is taken. It should be noted that it is not possible to measure exactly by means of the slice because of the presence of the small dish. Thus, a photograph, visible in FIG. 3, is taken, with an angle , in this example equal to 45, which results in the thickness measured being corrected by a factor 1/cos(), i.e. 2 if the angle is 45.

(10) By virtue of a calibration chart and image analysis software, the depth of penetration of the fluid composition, and therefore the thickness L of the layer impregnated with fluid composition, are extracted therefrom.

(11) The work is carried out with a HiROX KH 8700 video microscope equipped with the MX-macro Z VI objective and using proprietary software.

EXAMPLES

Example 1

(12) The following formula is prepared:

(13) Pulverulent Composition 1

(14) TABLE-US-00001 Composition 1 Compounds (%) FILLERS TALC (SUPPLIER = IMERYS) 56.88 PERLITE (OPTIMA T 2550 OR FROM WORLD MINERAL) 4.93 ALUMINIUM STARCH OCTENYLSUCCINATE (SUPPLIER = AKZO 4.93 NOBEL) ACRYLONITRILE/METHYL METHACRYLATE/VINYLIDENE 2.96 CHLORIDE COPOLYMER (EXPANSEL 551 DE40 D42 FROM AKZO NOBEL) MICA (CI 77019) (SUPPLIER = SCIAMA) 4.93 CORN STARCH (CORN STARCH B FROM ROQUETTE) 7.88 CLAY (HIGH-VISCOSITY PURIFIED SMECTITE FROM VANDERBILT 2.96 B) KAOLINITE (KAOLIN SUPREME FROM IMERYS) 3.94 LAUROYL LYSINE (AMIHOPEL FROM AJINOMOTO) 0.99 FILLER SILICA MICROBEADS (SILICA BEADS SB 700 FROM MIYOSHI 0.99 KASEI) CAPRYLYL GLYCOL 0.99 DIMETHICONE (AND) TRIMETHYLSILOXYSILICATE (DOW 0.99 CORNING 593 FLUID FROM DOW CORNING) LOW-VISCOSITY DIMETHICONE (XIAMETER PMX-0225 0.99 SILICONE FLUID FROM DOW CORNING) BINDERS GLYCERYL STEARATE (AND) CETYL ALCOHOL (AND) PEG-75 1.97 STEARATE (AND) CETETH-20 (AND) STEARETH-20 (EMULIUM DELTA FROM GATTEFOSSE) SORBITAN ISOSTEARATE (SPAN 120-[LO]-LQ-(MV) FROM 0.99 CRODA) DIMETHICONE (AND) DIMETHICONE/PEG-10/15 1.18 CROSSPOLYMER (KSG 210 FROM SHIN-ETSU) WATER 1.50

(15) Each of the compounds is weighed. The compounds are then ground in a Baker mill (paddle: 3000 revolutions/minute; motor 2700 revolutions/minute): the fillers and pigments are mixed for 5 minutes, the nacres are then added and mixed for 5 minutes, and finally the binder is added for 5 minutes. The powder obtained is diluted in water. The amount of water is at 40% by weight relative to the total weight of the composition. The solution obtained is poured into a small dish (reference of the small dish (53.5 cm): H250G, amount in small dish: between 8 and 10 g) in 35 mm50 mm format, lightly pressed using a manual press (pressure: 60 to 80 daN, by placing a screen of pressing net type (screen type: 3 thicknesses of Rimini 150). It is left to dry for at least 8 h, in this example 24 h, at 45 C. while ventilated.

(16) A white-coloured compact is obtained.

(17) The three white-coloured basic compositions, in the form of compact powders contained in small dishes, are introduced into a Gatocopy inkjet printer. Care is taken to position them such that, when the printing is launched, the fluid composition, consisting in this example of ink, comes onto the basic compositions and only onto said compositions.

(18) The inks used are: (manufacturer=Lesepidado): Ink Epson EU/ME Magenta (ref: ART.76304000) Ink Epson EU/ME Cyan (ref: ART.76304002) Ink Epson EU/ME yellow (ref: ART.76304001 Ink Epson EU/ME light Magenta (ref: ART.76304006) Ink Epson EU/ME light Cyan (ref: ART.76304004)

(19) Printing in 5 passes with three colours, chosen from the first three, is then carried out on each one.

(20) Cosmetic compositions each comprising an impregnated layer of the desired colour and usable without delay are obtained. It is possible to put one's makeup on by sampling the colour with a finger or with a tool.

(21) After five uses, the compositions become white again owing to the wear of the impregnated layer that has been entirely sampled.

(22) Further printing, with new colours, is then carried out.

Example 2

(23) The process is carried out as in Example 1, with the difference that, after the first 5 uses: the worn zones are detected and recorded, the printer is programmed so that it prints only on the worn zones, and the printer is controlled such that it prints, on the worn zones, the same colour as that originally used.

Example 3

(24) The process is carried out in the following way, after Example 1: the wear caused by each sampling by the user is determined and recorded. To do this, sampling tests are carried out via weighing, before and after, the cosmetic composition so as to deduce there from the amount taken on average by one sampling; the number of uses that the user wishes to perform is requested; taking into account the wear that the use causes, the thickness of layer to be impregnated in step a) of the process is deduced therefrom; the number of printing passes to be carried out is then deduced therefrom.

(25) In another example, a similar test is carried out with the inks chosen from the light inks (Ink Epson EU/ME light Magenta (ref: ART.76304006) and Ink Epson EU/ME light Cyan (ref: ART.76304004). Although it is difficult to determine whether wear has been reached (the colour not being very subtle), the amounts sampled are used as a basis to warn the user that a printing must be relaunched.