权利要求：
Claims 1. A color chart (1) for helping in the choice of a cosmetic product chosen within a range of cosmetic products having different respective hues, the color chart (1) comprising at least one transparent or translucent support (2) and, for at least one of said hues, at least one non-opaque, white-colored layer (5) and at least one non-opaque, colored layer (6), the color of which is close to that of the hue which it is desired to reproduce, superimposed on the white-colored layer (5), the white-colored (5) and colored (6) layers being printed on the transparent or translucent support (2). 2. The color chart (1) as claimed in claim 1, in which the colored layer (6) and optionally the white-colored layer (5) are such that the difference in colors between the color as it appears on looking at the color chart as a result of the printed layers and the hue of the corresponding cosmetic product which it is desired to reproduce, expressed as Delta E 2000, is less than 2, better still less than 1. 3. The color chart (1) as claimed in either of claims 1 and 2, in which the colored layer (6) and the white-colored layer (5) are such that the difference in level of coverage between the printed color and the applied layer of the cosmetic product of the corresponding hue which it is desired to reproduce, expressed as contrast ratio CR%, is less than or equal to ±15%. 4. The color chart (1) as claimed in any one of the preceding claims, comprising a plurality of transparent supports (2), which are connected together, in particular by a pivot, the transparent supports (2) being printed with respective colored layers (6) of different colors. 5. The color chart (1) as claimed in any one of the preceding claims, in which said at least one transparent or translucent support (2) comprises a flexible polymer film or a rigid or semirigid polymer sheet, said at least one transparent or translucent support (2) comprising at least one polymer chosen from a polyethylene, a polyacrylic, a polyvinyl chloride, a polyester, a polycarbonate or a polyethylene terephthalate (PET), preferably a PET. 6. The color chart (1) as claimed in any one of the preceding claims, in which the white-colored (5) and colored (6) layers form at least one pattern (7) and/or at least one opening (10) on the transparent or translucent support (2), in order to make it possible to see
through the transparent or translucent support (2), in zones (9) devoid of white-colored (5) and colored (6) layers. 7. The color chart (1) as claimed in any one of the preceding claims, in which the color chart (1) is in a form chosen from the group consisting of a roll, a bracelet, a forehead mask, a retaining ring, a flower with petals, a detachable page, in particular magazine page, and a portion of a packaging, in particular of a case or of a blister pack. 8. The color chart (1) as claimed in any one of the preceding claims, comprising a layer of a varnish covering all of the superimposed white-colored (5) and colored (6) layers, on the opposite side from the transparent or translucent support (2). 9. A range (20) of color charts (1), comprising a plurality of color charts (1) as claimed in any one of the preceding claims, each color chart (1) comprising a range of hues. 10. A method for the manufacture of a color chart (1), in particular as claimed in any one of claims 1 to 8, comprising the following stages, carried out for at least one of said hues: a) printing, on a transparent or translucent support (2), a non-opaque white- colored layer (5), b) printing, in particular after drying the white-colored layer, a non-opaque, colored layer (6), the color of which is similar to that of the hue which it is desired to reproduce, on the transparent or translucent support (2), the white-colored layer (5) and the colored layer (6) being printed so as to be superimposed to one another. 11. The method as claimed in claim 10, the color of the colored layer (6) superimposed on the white-colored layer (5) being such that the Delta E 2000 between this color and the color of the corresponding hue of the cosmetic product on application is less than 2, in particular less than 1. 12. The method as claimed in claim 10 or 11, in which the thickness of the white- colored layer (5) and/or the color of the colored layer (6) is(are) chosen so that the difference in level of coverage between the printed layer and the applied layer of the cosmetic product of the corresponding hue, expressed as difference in contrast ratio CR%, is less than or equal to ±15%. 13. The method as claimed in any one of claims 10 to 12, stages a) and b) being carried out in this order.
14. The method as claimed in any one of claims 10 to 13, employing, for the printing in stages a) and b), an inkjet printer comprising a white ink, preferably a solvent- based, in particular eco-solvent-based, inkjet printer. 15. The method as claimed in any one of claims 10 to 14, comprising the following stages: (a') applying a cosmetic product of one of said hues to an evaluation device comprising at least two regions respectively colored white and black, (b') carrying out at least one measurement, in particular of reflectance, on the two regions, so to calculate the level of coverage and the color of the hue on the evaluation device, (c') carrying out at least one printing, on the or a transparent or translucent support (2), of a non-opaque white-colored layer (5), with a different thickness, and printing a non-opaque, colored layer (6), the color of which is similar to that of the hue which it is desired to reproduce, superimposed on the white-colored layer (5) on the transparent or translucent support (2), (d') positioning the transparent or translucent support (2) comprising the printed layers on at least the region colored white of a virgin evaluation device and carrying out at least one measurement, in particular of reflectance, on the colored layer in order to calculate the color and optionally the level of coverage of the colored layer superimposed on the white-colored layer on the transparent or translucent support, (e') comparing the levels of coverage calculated in stages b') and d'), so as to calculate the Delta E 2000 and/or the contrast ratio %CR between the hue of the applied cosmetic product and the printed color, (f') choosing, for at least said hue or for an assembly of hues, a thickness of the white-colored layer and/or adjusting the printing color of the colored layer so that the Delta E 2000, between the hue applied to the evaluation device and the color of the colored layer superimposed on the white-colored layer, is less than 2, preferably less than 1, and/or that the
difference in contrast ratio %CR is less than or equal to ± 15%, in order to produce the color chart. 16. A method for choosing a cosmetic product within a range of cosmetic products having different respective hues, by using a color chart as claimed in any one of claims 1 to 8, comprising the following stages: - superimposing the color chart on the skin, - observing the color chart thus superimposed on the skin, - choosing the hue and thus the corresponding cosmetic product. 17. The method as claimed in the preceding claim, comprising the preliminary stage consisting in choosing a color chart within the range of color charts as claimed in claim 9, in particular in order to correspond to the user’s complexion or makeup strategy. 18. An assembly (35) of a range of cosmetic products with different respective hues and of at least one color chart (1) as claimed in any one of claims 1 to 8 or of a range (20) of color charts (1) as claimed in claim 9.