Composition of chalk and its uses

Abstract

The present invention relates to a composition comprising or essentially consisting of mud and chalk, the mud comprising an aqueous phase and clay. This composition exhibits good stability and combines the properties of clay and chalk. Various uses for this composition are proposed, including cosmetic applications. Figure 3 (for the abstract)

Description

Title of the invention: Chalk-based composition and its uses

[0001] The invention relates to a chalk-based composition and its uses as a cosmetic and pharmaceutical composition.

[0002] Within the range of cosmetic and aesthetic treatments, body wraps hold a special place in beauty salons and spas. Such wraps consist of covering all or part of the body with various mixtures made up of mud and different products with therapeutic or at least cosmetic properties, offering a moment of well-being for the person receiving the treatment.

[0003] In practice the treatment consists of applying a mixture of products to the skin, then wrapping the body in plastic film or fabric to help hydration, but also to nourish or detoxify the skin, the wrap may also be associated or not with a light or firmer massage, with exudation in a hammam, or even with exfoliation or peeling.

[0004] The products used in body wraps can vary according to individual needs. Some wraps are designed to hydrate the skin using products rich in oils or moisturizing butters, while others are designed to eliminate toxins and stimulate blood circulation using ingredients such as clay, seaweed, or herbs. Some wraps may also have firming or soothing effects.

[0005] Body wraps and their benefits vary depending on the products used. Depending on the spa chosen, it is possible to opt for a wrap with seaweed, cocoa, coffee, rhassoul clay, green clay, or even green tea! The range of choices is wide, and everything depends on the desired benefits and skin type.

[0006] Some wraps use chalk, a natural product known to cleanse and nourish the skin. The chalk, the fineness of which can vary depending on its origin, is generally mixed with a liquid on the spot and applied to the body of the person being treated.

[0007] However, given the fineness of the chalk particles, the preparation is not stable, and it is often necessary to re-disperse the chalk in the water when applying it, which is a waste of time and unnecessary effort for the person providing the wrap treatment.

[0008] Also, and in particular in the context of the use of chalk in the context of a wrap, it is necessary to find new formulations which remain natural but which compensate for known shortcomings, such as the rapid precipitation of chalk once dispersed in water.

[0009] The objective of the present invention is precisely to remedy these drawbacks.

[0010] One of the aims of the invention is to provide a stable composition, applicable to a person's skin, and which requires no further handling other than application once it has been prepared.

[0011] Another object of the invention is to propose a cosmetic use of such a composition.

[0012] Yet another object of the invention is to provide a cosmetic method using said composition.

[0013] Also, the invention relates to a composition comprising or consisting essentially of mud and chalk, the mud comprising an aqueous phase and clay.

[0014] The invention is based on the unexpected finding by the inventors that the mixture of mud and chalk makes it possible to propose a cosmetic composition which is stable in suspension and does not precipitate as quickly as the simple mixture of chalk in a liquid, such a composition also retains the properties of chalk when it is applied to the skin in particular as part of a wrap or a mask.

[0015] Within the framework of the invention, the composition is therefore composed essentially of chalk, clay and an aqueous phase.

[0016] Chalk, which is approximately 80 million years old, is composed of the shells of phytoplankton, particularly microalgae called coccolithophores. These microalgae have the unique ability to form a shell by absorbing calcium and CO2 dissolved in seawater and releasing oxygen through photosynthesis. When the microorganism dies, the shell sinks to the seabed. Limestone, therefore, originates from the sedimentation of algal shells over millions of years. Chalk is composed of calcium, the most abundant trace element in mammals, where it contributes to bone formation. It also plays a role in skin health by participating in the renewal of the superficial layer of the epidermis (promoting healing and skin repair, and strengthening this skin barrier by forming a protective shield). Calcium also contributes to skin hydration by reducing transepidermal water loss.

[0017] The analgesic, relaxing and well-being properties of chalk in wrapping methods are well known.

[0018] However, the calcium contained in chalk is poorly soluble in water, which leads to its rapid precipitation (phase separation) after the preparation of aqueous mixtures.

[0019] The first consequence of this precipitation is to trap the dissolved calcium ions with the precipitate, thus causing the composition to lose its It possesses conductivity properties and facilitates transcutaneous exchange. Therefore, chalk loses all the properties it acquired when dissolved upon precipitating.

[0020] Another disadvantage is that this precipitation generates limescale deposits in the pipes, and causes blockages in the flows, requiring the use of corrosive acidic products to remove them.

[0021] The inventors observed that mixing chalk with mud caused the mud to swell, thus stabilizing the mixture in suspension. With this mixture, the chalk no longer separates as quickly, and the separation is significantly delayed.

[0022] The mud used in the invention is made of clay. Clay is a rock composed of aluminum silicate in more or less hydrated sheets, which comes from the erosion of rocks, from neoformation or from the transformation of minerals.

[0023] Clay, or clays, possess numerous physicochemical properties and in particular: plasticity, absorption, adsorption, compaction, dispersion, thixotropy, coverage, colloidal properties, etc., all these properties resulting from the structure and composition of the clay considered.

[0024] Clays are all made up of silicon, aluminum, oxygen, magnesium, hydroxyl ions, potassium, sodium, iron and calcium, and form a stack of sheets composed of different layers of atoms.

[0025] Clay is also known for its cosmetic and therapeutic benefits, both cutaneous and rheumatological, and has purifying, detoxifying, cleansing, sebum-regulating, exfoliating, remineralizing, anti-inflammatory, absorbent, adsorbent, pain-relieving, intestinal wall-protective, and tooth enamel-strengthening properties...

[0026] The combination of clay and chalk in the composition according to the invention significantly enhances and potentiates the effect of the chalk. Indeed, the layered structure of the clay used allows the chalk to adhere to it and thus prevents it from separating in the mixture. The calcium ions released by the dissolution of the chalk in the aqueous solution are therefore available, which increases transcutaneous exchange and thus preserves the benefits of the chalk.

[0027] The main function of the clay in the composition according to the invention is to act as a carrier for the chalk, and to potentiate the action of the latter without loss of properties due to phase shift. However, given its properties, the clay also contributes its own properties, thus giving the composition according to the invention not only a synergistic effect of the chalk, but also a combined effect of the chalk and the clay.

[0028] Another advantage of the composition according to the invention is that the interaction between the clay and the chalk allows, when the wrap is washed off the person's body When treated, the two compounds combine, and limescale deposits no longer accumulate in the pipes.

[0029] It should be noted that the composition according to the invention also exhibits interesting properties such as: - a very significantly reduced phase shift in the chalk, - a viscosity of the composition greater than 150 mPA / s, which allows the composition to be easily spread, particularly on the skin, without slipping, and thus allows for easy wrapping of the surfaces to be covered, - a conductivity greater than 1 mSiemens per centimeter (mS / cm or mS.cm1), such a conductivity allows us to show the evolution of the mineral richness of the composition.

[0030] Advantageously, the invention relates to the aforementioned composition, where chalk represents from 60 to 75%, preferably from 70% to 75%, in particular 70% by mass relative to the total mass of chalk and clay.

[0031] The composition according to the invention therefore advantageously comprises, with respect to the solid components, i.e., clay and chalk, 60% to 75% by mass of chalk relative to the total mass of chalk and clay, the mass of water being excluded from this calculation. This means that the composition comprises 25% to 40% by mass of clay relative to the total mass of chalk and clay, the mass of water being excluded from this calculation.

[0032] The composition according to the invention therefore advantageously comprises, with respect to the solid components, i.e., clay and chalk, 70% to 75% by mass of chalk relative to the total mass of chalk and clay, the mass of water being excluded from this calculation. This means that the composition comprises 25% to 30% by mass of clay relative to the total mass of chalk and clay, the mass of water being excluded from this calculation.

[0033] By "60% to 75% by mass of chalk" in the invention means quantities by mass of chalk of 60%, 60.1%, 60.2%, 60.3%, 60.4%, 60.5%, 60.6%, 60.7%, 60.8%, 60.9%, 61%, 61.1%, 61.2%, 61.3%, 61.4%, 61.5%, 61.6%, 61.7%, 61.8%, 61.9%, 62%, 62.1%, 62.2%, 62.3%, 62.4%, 62.5%, 62.6%, 62.7%, 62.8%, 62.9%, 63%, 63.1%, 63.2%, 63.3%, 63.4%, 63.5%, 63.6%, 63.7%, 63.8%, 63.9%, 64%, 64.1%, 64.2%, 64.3%, 64.4%, 64.5%, 64.6%, 64.7%, 64.8%, 64.9%, 65%, %, 65.1%, 65.2%, 65.3%, 65.4%, 65.5%, 65.6%, 65.7%, 65.8%, 65.9%, 66.1%, 66.2%, 66.3%, 66.4%, 66.5%, 66.6%, 66.7%, 66.8%, 66.9%, 67%, 67.1%, 67.2%, 67.3%, 67.4%, 67.5%, 67.6%, 67.7%, 67.8%, 67.9%, 68%, 68.1%, 68.2%, 68.3%, 68.4%, 68.5%, 68.6%, 68.7%, 68.8%, 68.9%, 69%, 69.1%, 69.2%, 69.3%, 69.4%, 69.5%, 69.6%, 69.7%, 69.8%, 69.9%, 70%, 70.1% 70.2%, 70.3%, 70.4%, 70.5%, 70.6%, 70.7%, 70.8%, 70.9%, 71%, 71.1%, 71.2%, 71.3%, 71.4%, 71.5%, 71.6%, 71.7%, 71.8%, 71.9% 72%, 72.1%, 72.2%, 72.3%, 72.4%, 72.5%, 72.6%, 72.7%, 72.8%, 72.9%, 73%, 73.1%, 73.2%, 73.3%, 73.4%, 73.5%, 73.6%, 73.7%, 73.8%, 73.9%, 74%, 74.1%, 74.2%, 74.3%, 74.4%, 74.5%, 74.6%, 74.7%, 74.8%, 74.9% or 75% relative to the total mass of chalk and clay.

[0034] By "70% to 75% by mass of chalk" in the invention means quantities by mass of chalk of 70%, 70.1%, 70.2%, 70.3%, 70.4%, 70.5%, 70.6%, 70.7%, 70.8%, 70.9%, 71%, 71.1%, 71.2%, 71.3%, 71.4%, 71.5%, 71.6%, 71.7%, 71.8%, 71.9%, 72%, 72.1%, 72.2%, 72.3%, 72.4%, 72.5%, 72.6%, 72.7%, 72.8%, 72.9%, 73%, 73.1%, 73.2%, 73.3%, 73.4%, 73.5%, 73.6%, 73.7%, 73.8%, 73.9%, 74%, 74.1%, 74.2%, 74.3%, 74.4%, 74.5%, 74.6%, 74.7%, 74.8%, 74.9% or 75% relative to the total mass of chalk and clay.

[0035] By "25% to 40% by mass of clay" in the invention means quantities by mass of clay of 25.0%, 25.1%, 25.2%, 25.3%, 25.4%, 25.5%, 25.6%, 25.7%, 25.8%, 25.9%, 26.0%, 26.1%, 26.2%, 26.3%, 26.4%, 26.5%, 26.6%, 26.7%, 26.8%, 26.9%, 27.0%, 27.1%, 27.2%, 27.3%, 27.4%, 27.5%, 27.6%, 27.7%, 27.8%, 27.9%, 28.0%, 28.1%, 28.2%, 28.3%, 28.4%, 28.5%, 28.6%, 28.7%, 28.8%, 28.9%, 29.0%, 29.1%, 29.2%, 29.3%, 29.4%, 29.5%, 29.6%, 29.7%, 29.8%, 29.9%, 30.0%, 30.1%, 30.2%, 30.3%, 30.4%, 30.5%, 30.6%, 30.7%, 30.8%, 30.9%, 31.0%, 31.1%, 31.2%, 31.3% 31.4%, 31.5%, 31.6%, 31.7%, 31.8%, 31.9%, 32.0%, 32.1%, 32.2%, 32.3%, 32.4%, 32.5%, 32.6%, 32.7%, 32.8%, 32.9%, 33.0%, 33.1%, 33.2%, 33.3%, 33.4%, 33.5%, 33.6%, 33.7%, 33.8%, 33.9%, 34.0%, 34.1%, 34.2%, 34.3%, 34.4%, 34.5%, 34.6%, 34.7%, 34.8% 34.9%, 35.0%, 35.1%, 35.2%, 35.3%, 35.4%, 35.5%, 35.6%, 35.7%, 35.8%, 35.9%, 36.0%, 36.1%, 36.2%, 36.3%, 36.4%, 36.5%, 36.6%, 36.7%, 36.8%, 36.9%, 37.0%, 37.1%, 37.2%, 37.3%, 37.4%, 37.5%, 37.6%, 37,7%, 37.8%, 37.9%, 38.0%, 38.1%, 38.2%, 38.3%, 38.4%, 38.5%, 38.6%, 38.7%, 38.8%, 38.9%, 39.0%, 39.1%, 39.2%, 39.3%, 39.4%, 39.5%, 39.6%, 39.7%, 39.8%, 39.9% or 40.0% relative to the total mass of chalk and clay.

[0036] By "25% to 30% by mass of clay" in the invention means quantities by mass of clay of 25.0%, 25.1%, 25.2%, 25.3%, 25.4%, 25.5%, 25.6%, 25.7%, 25.8%, 25.9%, 26.0%, 26.1%, 26.2%, 26.3%, 26.4%, 26.5%, 26.6%, 26.7%, 26.8%, 26.9%, 27.0%, 27.1%, 27.2%, 27.3%, 27.4%, 27.5%, 27.6%, 27.7%, 27.8%, 27.9%, 28.0%, 28.1%, 28.2%, 28.3%, 28.4%, 28.5%, 28.6%, 28.7%, 28.8%, 28.9%, 29.0%, 29.1%, 29.2%, 29.3%, 29.4%, 29.5%, 29.6%, 29.7%, 29.8%, 29.9% or 30.0% relative to the total mass of chalk and clay.

[0037] The inventors unexpectedly realized that such proportions of chalk and clay made it possible to respect the aforementioned physicochemical properties.

[0038] This is particularly advantageous when the composition comprises 70 to 90% by mass, in particular 80% by mass of aqueous solution, relative to the total mass of the composition, and therefore 10% to 30% by mass, in particular 20%, by mass of the chalk and clay mixture.

[0039] In other words, advantageous compositions of the invention are compositions comprising: - 14% to 15% chalk by mass, - 5% to 6% clay by mass, and - 80% by mass of aqueous solution,

[0040] or comprising - 7 to 7.5% chalk by mass, - 2.5% to 3% clay by mass, and - 90% by mass of aqueous solution,

[0041] or comprising - 21 to 22.5% chalk by mass, - 7.5% to 9% clay by mass, and - 70% by mass of aqueous solution,

[0042] the percentages being expressed in mass relative to the total mass of the composition, i.e. the sum of the masses of the chalk, the clay and the aqueous solution.

[0043] More generally, the invention relates to an advantageous composition comprising - 7% to 22.5% chalk by mass, - 2.5 to 9% clay by mass, - 70% to 90% by mass of aqueous solution

[0044] the percentages being expressed in mass relative to the total mass of the composition, the proportion of clay and chalk being in a ratio of 25:75 to 30:70.

[0045] Advantageously, the invention relates to the aforementioned composition, where the clay is a smectite, in particular montmorillonite or bentonite.

[0046] Smectites are a group of clay minerals, and therefore silicates, more precisely phyllosilicates.

[0047] Montmorillonite is a mineral composed of hydrated aluminum and magnesium silicate, with the formula (Na,Ca)₂O₃(Al,Mg)₂Si₄O₃(OH)₂ • n H₂O, and belonging to the smectite group, in the phyllosilicate family. It is also called Sommières clay. Its structure is of the tetrahedral / octahedral / tetrahedral type, meaning that a sheet of montmorillonite is formed of three layers:

[0048] - an octahedral layer A1(OH)5O: 7 atoms for 6 vertices and aluminum in the center. The OH and oxygen are shared between the different octahedra that make up the layer;

[0049] - and two tetrahedral layers which cover the octahedral layer on each side Its base; SiO4: 5 atoms for 4 vertices and silicon in the middle. The oxygen atoms are shared between the different tetrahedra that make up the layer.

[0050] Bentonite is a colloidal clay also known as fuller's earth. It is considered a smectite, being essentially composed of montmorillonite at 80%.

[0051] All these clays have swelling properties, which are particularly useful in the context of the composition according to the invention.

[0052] Advantageously, the invention relates to the aforementioned composition, said composition having a minimum viscosity of 150 mPA / s, and a conductivity greater than 1 mS / cm.

[0053] Viscosity is a dynamic viscosity measured under normal temperature and pressure conditions, i.e., at atmospheric pressure and laboratory temperature, i.e., at a temperature ranging from 17 to 28°C, and a pressure ranging from 980 to 102 kPa. A viscometer of type NDJ-9S manufactured by Vevor, using rotor no. 1 at a speed of 12 rotations per minute, as indicated by the manufacturer's instructions.

[0054] Conductivity is measured using a Hanna HI98312 conductivity meter, using a graphite probe.

[0055] Even more advantageously, the invention relates to the aforementioned composition, where said aqueous phase is water or dealcoholized wine or one of its precursors.

[0056] In the invention, dealcoholized wine means wine or sparkling wine, for example champagne, which has been dealcoholized.

[0057] In the invention, a precursor of a wine, sparkling or not, is meant a more or less concentrated grape must, a hydrosol or a distillate of grape must or vine flowers.

[0058] Besides water, which can be an aqueous phase or an aqueous solution suitable for forming mud with clay and chalk, the use of an aqueous phase in the form of dealcoholized wine or one of its precursors, in particular dealcoholized sparkling wine, is particularly desirable, especially in champagne-producing areas.

[0059] The use of wine, especially sparkling wine, is not recommended in cosmetics due to the presence of alcohol, which can irritate the skin. However, the different

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[0067] Components of wine, hydrosols, or distillates of grape must or vine flowers, such as polyphenols, antioxidants, tannins, anthocyanins, vitamins, minerals, amino acids, and fruit acids, are highly suitable for cosmetic treatment. Therefore, it is advantageous to use dealcoholized wine, particularly sparkling wine. This can be achieved through a vacuum distillation process at temperatures between 30 and 40°C. The resulting distillation product can then be used as an aqueous solution or aqueous phase in the composition according to the invention. Advantageously, the invention therefore relates to an advantageous composition comprising - 7% to 22.5% chalk by mass, - 2.5 to 9% clay by mass, - 70% to 90% by mass of wine, including sparkling wine, dealcoholized wine or one of the precursors of said wine, the percentages being expressed in mass relative to the total mass of the composition, the proportion of clay and chalk being in a ratio of 25:75 to 30:70. Advantageously, the invention relates to one of the following compositions comprising: - 14% to 15% chalk by mass, - 5% to 6% clay by mass, and - 80% by mass of dealcoholized sparkling wine, or including - 7 to 7.5% chalk by mass, - 2.5% to 3% clay by mass, and - 90% by mass of dealcoholized sparkling wine, or including - 21 to 22.5% chalk by mass, - 7.5% to 9% clay by mass, and - 70% by mass of dealcoholized sparkling wine, the percentages being expressed in mass relative to the total mass of the composition, that is to say the sum of the masses of the chalk, the clay and the aqueous solution. It should be noted that the distillation of sparkling wines can result in a partial loss of the CO2 contained in the beverage. To mitigate this drawback, it is possible to degas the wine before distillation, and once distillation is complete, to reinject exogenous CO2 into the liquid. The presence or enrichment in CO2 is particularly advantageous, because in the presence of chalk, calcium bicarbonate will be produced by the release of ions carbonate, and will give the composition soothing properties. In addition, the CO2 in sparkling wine (endogenous or exogenous) possesses advantageous antioxidant and bacteriostatic properties.

[0068] It is also possible to use carbonated water, or simply naturally carbonated water, in the composition according to the invention. Therefore, in the invention, when water is mentioned, it should be understood to mean both still (non-carbonated) water and carbonated water, whether natural or enriched with CO2.

[0069] In summary, during the preparation of the mud or composition according to the invention, the CO2 will produce a partial dissolution of the chalk, which will increase its bioavailability of calcium and calcium bicarbonate ions. The clay will keep the mixture in suspension by increasing its viscosity, and its layered structure will act as a cation exchanger. The conductivity of the composition will thus be increased.

[0070] In another aspect, the invention relates to the use of the aforementioned composition for cosmetic application on the skin.

[0071] The application on the skin, of a purely cosmetic type, takes advantage of the different combined properties of clay and chalk, the properties of chalk being potentiated in the presence of clay.

[0072] This application on the skin will have the cosmetic effect of improving general and cutaneous well-being and soothing, but also of improving hydration, strengthening the skin barrier, purifying or exfoliating the skin, cleansing or detoxifying it.

[0073] Anti-inflammatory or analgesic type effects may also be expected, particularly when the composition is used hot (for example for relaxation), or cold (stimulating effect).

[0074] The cosmetic uses of the composition according to the invention are very numerous.

[0075] When used alone, the composition according to the invention can be applied to the skin, whether on the face or body, i.e., as a face mask or as a poultice on a part of the body (back, joints, muscles, etc.), or as a bath (feet, hands), or as a full-body wrap. In this application, the desired effects are hydration, strengthening of the skin barrier, an analgesic effect, sebum regulation, and purifying action.

[0076] The composition according to the invention can also be associated with other cosmetic compositions, for applications such as soaps, shampoos, day creams, serums, hair masks, body lotions, gels or massage oils, etc. In this case, the composition according to the invention is added to the aforementioned cosmetic compositions in addition to its own components.

[0077] In another aspect, the invention relates to the aforementioned composition, for the treatment of skin diseases, in particular acne.

[0078] The composition according to the invention can also be used in a therapeutic context to treat skin conditions, in particular bacterial conditions such as acne.

[0079] The invention also relates to a non-therapeutic cosmetic method of wrapping an individual, comprising a step of topical application of a layer of the composition as defined above.

[0080] The cosmetic composition according to the invention is used to implement a non-therapeutic cosmetic method, which comprises: - the preparation of the composition according to the invention, by mixing under agitation chalk and clay in water or dealcoholized wine or one of its precursors, as defined above, in a chalk:clay proportion of 60:40 to 75:25, - the spreading of the resulting composition over a body surface to be covered, and - optionally leave the composition in contact with the body surface for a period of 15 to 45 min, followed by rinsing with water.

[0081] Advantageously, the invention relates to the aforementioned method, where the layer has a thickness of 1 to 20 mm.

[0082] Depending on the chosen cosmetic treatment, it is possible to apply a layer of varying thickness to the body surface to be covered. With a thin layer, it is best to leave the product on the covered surface for a short time due to evaporation. Conversely, with a thick layer, the product can be left on the body surface for a longer period. It can even be warmed for a feeling of well-being.

[0083] The invention will be better understood with the aid of the figures and examples detailed below. Brief description of the figures

[0084] [Fig. 1] Figure 1 shows photographs of a composition made of chalk and water (100% chalk) left to settle. A shows the result after 30 minutes of settling, B shows the result after 3 hours of settling.

[0085] [Fig. 2] Figure 2 shows photographs of a composition consisting of chalk (75%), clay (25%), and water that has been allowed to settle. A shows the result after 30 minutes of settling, and B shows the result after 3 hours of settling.

[0086] [Fig.3] Fig.3 shows photographs of the three compositions after 17 hours of decantation. A: composition 100% chalk; B: composition 75% chalk, 25% clay and C: composition 70% chalk, 30% clay.

[0087] [Fig. 4] Figure 4 shows a graph illustrating the viscosity measurements in mPa·s of the 3 chalk + clay-based formulations as a function of time, expressed in hours. A: 100% chalk composition; B: 75% chalk, 25% clay composition; and C: 70% chalk, 30% clay composition. Examples

[0088] Example 1: Example of a composition according to the invention

[0089] This formulation comprises two phases:

[0090] - a powdered phase based on chalk (70%) and clay (30%),

[0091] - a liquid phase based on dealcoholized sparkling wine + / - enriched with CO2.

[0092] The following mixture is prepared for 1 kg of composition: - 140g of chalk, - 60g of clay, - 800g of dealcoholized champagne from the Henri Giraud estate, Aÿ-en- Champagne.

[0093] The mixture is blended for 3 minutes at 1500 rpm. The mud is then ready for topical application.

[0094] During the preparation of the mud, the CO2 will produce a partial dissolution of the chalk, which will increase its bioavailability in calcium ions and calcium bicarbonates, the clay

[0095] will keep the mixture in suspension by increasing its viscosity, and

[0096] its sheet-like structure will act as a cation exchanger. The viscous nature of the composition is immediately noticeable when the hand is immersed in the container holding the mixture.

[0097] Example 2: Comparative example of compositions according to the invention with a suspension of chalk in water.

[0098] In this example, 3 formulations with 20% dry matter were compared:

[0099] 1) Formulation 1 - 0:

[0100] - 800g of water,

[0101] - 200g of chalk,

[0102] -0g of clay,

[0103] 2) formulation 2 - 75 / 25:

[0104] - 800g of water,

[0105] - 150g of chalk,

[0106] - 50g of clay,

[0107] 3) formulation 3: 70 / 30:

[0108] - 800g of water,

[0109] - 140g of chalk,

[0110] - 60g of clay,

[0111] For each of the formulations, the ingredients are mixed for 3 min at 1500 rpm.

[0112] The formulations are then placed in graduated beakers and left to settle. for at least 17 hours. Periodic readings are taken, noting the graduation mark reached by the solid phase of the formulation. The higher the graduation mark, the less pronounced the phase shift.

[0113] At t=Oh, the formulations, and the solid phase reaches a height of 900mL. All the solid components are in suspension, and there is no phase shift. Results#:

[0114] For formulation 1, after 30 minutes, a significant phase shift is observed in Figure IA. The chalk has precipitated significantly, and the liquid level is at 360 mL (corresponding to a solid level of 540 mL). After 3 hours, Figure 1B shows an even more pronounced phase shift, and the liquid level is at 600 mL (corresponding to a solid level of 300 mL). The phase shift is complete; all the chalk has precipitated.

[0115] For formulation 2, at 30 min, no phase shift is observed as shown in Figure 2A, and a very slight phase shift is observable at 3h with a liquid level of 2ml (i.e. a solid level of 880 mL) as shown in Figure 2B.

[0116] For formulation 3, at 30 min, 3 h, or 17 h, no phase shift is observed (Figure 3C), whereas a small phase shift is observable for formulation 2 at the same time (Figure 3B). Clearly, formulation 1 (Figure 3A) shows complete chalk precipitation, as at 3 h.

[0117] These results clearly show the effect of combining chalk and clay.

[0118] The viscosity of the formulations was also measured as a function of time ([Fig.4]). The viscosity of formulation 1 remains stable for up to 17 hours after mixing, at around a value of 28 mPa.s'. Such a viscosity is too low for good application to the skin, at the risk of not being able to achieve a stable application, i.e., one that does not glide.

[0119] The viscosity of formulation 3 very quickly reaches a plateau of 483 mPa.s 1, while the viscosity of formulation 2 increases over time and is not stabilized at 17h.

[0120] The conductivity of the different formulations was also measured and remains stable for all three formulations:

[0121] - formulation 1: 0.61 mS / cm

[0122] - formulation 2: 1.48 mS / cm

[0123] - formulation 3: 1.70 mS / cm.

[0124] Another comparative test was also carried out with a prepared formulation 4 of in the same way as the previous ones and comprising 90% chalk and 10% clay (in 800g of water). Such a composition has a viscosity similar to formulation 1, a conductivity of 1.05 mS / cm, and exhibits a significant phase shift (600mL of solid) from 30 min.

[0125] Finally, tests were carried out with a formulation 5 comprising 60% chalk and 40% clay. This formulation does not separate even after 17 hours, immediately reaches the viscosity plateau of formulation 3, and has a conductivity of more than 2 mS / cm.

[0126] The best composition is therefore formulation 3, which offers all the expected advantages and whose viscosity is not at its maximum during mixing, thus facilitating application during treatment. Formulations 2 and 5 are, however, perfectly acceptable.

Claims

Demands

1. Composition consisting of mud and chalk, the mud comprising an aqueous phase and clay where the chalk represents 60 to 75%, preferably 70% to 75%, by mass relative to the total mass of chalk and clay.

2. Composition according to claim 1, wherein the clay is selected from smectites, in particular montmorillonite and bentonite.

3. Composition according to claim 1 or 2, said composition having a minimum viscosity of 150 mPA / s, and a conductivity greater than 1 mS / cm.

4. Composition according to any one of claims 1 to 3, or the aqueous phase is water or dealcoholized wine, dealcoholized sparkling wine, or one of their precursors.

5. Compositions according to claim 4, wherein dealcoholized sparkling wine or one of its precursors is enriched with CO2.

6. Use of the composition as defined in any one of claims 1 to 5, for cosmetic application on the skin.

7. A non-therapeutic cosmetic method of wrapping an individual, comprising a step of topical application of a layer of the composition as defined in any one of claims 1 to 5.

8. Cosmetic method according to claim 7, wherein the layer has a thickness of 1 to 20 mm.

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