DE102018103386A1 - Process for the production of powdery mines and products made therewith - Google Patents

Abstract

A method for producing a powder mine is described, wherein a. at least one colorant, at least one filler and at least one binder are mixed with a carrier liquid, b. be formed from the wet mass mines, c. the mines formed in step b) are passed through a chamber in which they are exposed to a powdery wrapping agent, andd. the dusted mines are fed into a drying device and dried there,

Description

The present invention relates to the production and use of powdery mines, especially in the cosmetic field. In addition, the present invention provides powder mines which can be produced by the process according to the invention.

Pens containing cantilevered or pickled mines are widely used and well known, especially in the field of writing utensils and cosmetics. Methods for producing mines for such pens have long been known. Normally, mines are made from a high proportion of fillers, pigments and binders. The hardness of the mine depends on the particular ingredients used and on the production. Tougher mines are useful for processing because they are easier to process, e.g. when they are placed in moldings or used in holders. Even the tips are easy. However, harder mines give less color, which is considered to be disadvantageous in some writing instruments as well as in the field of cosmetics. Often, e.g. In the field of cosmetics, it is desirable that a refill be so soft that it can be easily applied and produces a pleasant feeling on the skin. However, soft mines have the disadvantage of being more difficult to work with, as they tend to break or crumble.

Particularly suitable for cosmetic use are powder mines. Mine powders are mines that are produced from pulverulent ingredients, essentially without matrix-forming fillers. Fillers that fuse into a matrix during processing create stability but can adversely affect the release properties. Powder mines are therefore used primarily in the field of cosmetics. They offer a very pleasant application, do not scratch when applying and give enough mass to produce a colorful order.

However, powder mines tend to crumble and break and are also very difficult to point. The more pleasant a powder mine is on order, the more difficult it is to process normally, and the easier the processing, the harder and the scratchier the order.

Powder mines are usually prepared by kneading a very high proportion of fillers and pigments with a mixture of water and binder. The wet mass is then extruded and then dried to evaporate the water.

In order to increase the strength of powdery mines, it is known to immerse them in a liquid stabilizing agent after forming and to harden them. Frequently, this liquid wax or a liquid wax solution is used. However, the process is expensive. In addition, further problems arise because the mines for diving must have a certain mechanical stability.

Out EP 2 133 214 For example, a process is known in which a mass for a colored mine is mixed with microwax particles, which then melt on drying within the mass and fill up the pores formed by the drying. Although mines produced by this method have higher strength through the wax composition, the mines do not have a high delivery to the skin, and in particular, result in a "waxy" smear, that is, a discomforting feeling when applied to the skin.

It is still out EP 836 846 It is known to immerse mines in liquid wax, liquid fats or fatty acids after shaping and drying in order to change the smear behavior. By this immersion, a wax absorption between about 15 and 25% of the total weight is achieved. A mine with such a high wax content does not have the advantages of a powder mine and does not provide a pleasant job.

It is also known to provide mines by coextrusion with a plastic shell. However, this process is very complex and leads to satisfactory results only in hard mines. In addition, very high temperatures must be used for coextrusion, which are not suitable for all ingredients of a powder mine, especially for those intended for cosmetic use.

It was therefore an object of the invention to provide powdery minerals, which can be applied easily, create a pleasant feeling when applying, do not scratch the job, give so much mass in a job that the desired hue and the desired color depth can be achieved, and which can also be processed in a simple manner by conventional methods without too much breakage.

Another disadvantage of known powder mines, which are very soft, is that they need to be sharpened practically after each job, which some users perceive as unpleasant or expensive. In addition, if the mine is too soft, usually no perfect Spitzbild achieved. However, for the best possible application feeling and the best possible application quantity, a soft lead is very advantageous. However, as it breaks easily, the scrap in the production is very high. Although it is possible to provide the inherent stability of a powder mine with additional protection, such as a heat shrink tubing, it is difficult to keep the mine so stable at all. To apply a shrink tube, the mine must be lifted and surrounded with the shrink tube. Also in this case can already arise broke due to breakage.

A further object of the invention is therefore also to stabilize a powder mine, at least temporarily, so that it can at least be transported and fed to a downstream processing installation.

The abovementioned objects are achieved according to the invention by dusting a powdery powder with a powdery coating agent which melts at the temperature of the drying and forms a stabilizing coating on cooling, which gives the mine inherent stability. The dusting agent added according to the invention thus imparts inherent stability to the mine without adversely affecting the other properties of the mine.

It has surprisingly been found that self-stabilization of powdery mines can be achieved without compromising the desired properties, such as comfortable application, scratch resistance and adequate release, by making a very thin coating and adjusting it so as to allow deeper penetration into the powder Pores is avoided. In addition, it is possible with the inventive method to produce stable powder mines in a simple process. The process can be adapted in a simple manner to the respective desired formulation. With the method according to the invention it is possible to produce powder mines of any desired thickness.

The process according to the invention makes it possible to produce even very soft powder mines that are so soft that the application is extremely pleasant and the delivery very satisfactory, so that they can be processed substantially without breaking into pins. The further processing of the powder mine is thereby considerably facilitated and it opens up new applications for powder mines.

1. a. mindestens ein Färbemittel, mindestens ein Füllstoff und mindestens ein Bindemittel werden mit einer Trägerflüssigkeit gemischt,
2. b. aus der nassen Masse werden Minen geformt,

• c. die in Stufe b) geformten Minen werden durch eine Kammer geführt, in der sie einem pulverförmigen Hüllmittel ausgesetzt werden, und
• d. die bestäubten Minen werden in eine Trockenvorrichtung geführt und dort getrocknet.

The method according to the invention for producing a powder mine comprises the following steps:

1. a. at least one colorant, at least one filler and at least one binder are mixed with a carrier liquid,
2. b. Mines are formed from the wet mass

• c. the mines formed in step b) are passed through a chamber in which they are exposed to a powdery wrapping agent, and
• d. The dusted mines are fed into a drying device and dried there.

From the constituents forming the mine, a mixture is thus prepared and pasted with a carrier liquid. The resulting mass is formed into mines, which are then dusted with a coating agent. The dusted mines are dried at elevated temperature, with the encapsulant melting and running on the surface of the mine. Upon cooling, the hardened enveloping agent forms a crust that protects the refractory from crumbling and crumbling so that it can be easily processed.

By means of the method according to the invention, it is ensured that the wrapping means is only in a very small thickness and substantially only on the surface of the mine. Since the coating medium thickness is low, the sheath is removed at the tips of the front of the mine and therefore can not disturb the order. In addition, due to the low penetration depth, the wrapping agent also does not change the properties of the lead mass.

Another advantage of the method according to the invention is that the type and amount of the casing can be set independently of the mine or the ingredients of the mine. Since the envelope rests on the refill, there is virtually no problem with compatibility, and the wrapping agent can therefore be selected according to functional and aesthetic considerations. Since the penetration depth is low and the When the covering agent is worn off during peaking, it essentially does not come into contact with the application area, so that it does not change the properties of the applied mining compound.

After the preparation of the mine and the drying, therefore, the mine produced according to the invention can be easily processed further. In general, the mine is provided with a tubular protective sheath, brought to the intended length and then shrunk by application of heat of the sheath. Subsequently, the mines are then further processed into sticks in a conventional manner, e.g. they are inserted into pin blanks or used in turning devices.

First, the lead mass is made by mixing the ingredients. For this purpose, the powdery and liquid components are mixed together. The order of addition is not critical. The powdery ingredients may be premixed and then the liquid added, or all ingredients may be contacted and then mixed simultaneously, or individual ingredients may be premixed separately in any order.

The lead composition contains at least one colorant, at least one filler and at least one binder, and may contain other ingredients common to powdered minerals, e.g. Lubricants and preservatives and other additives known in the art. The solid ingredients used to make the powder mine are all powdered, i. have a particle size in the range of 0.1 to 200 μm, e.g. 0.5 to 150 μm. The particle size varies according to the type of ingredient, mixtures of particles of different sizes can be used. For example, pearls with a size of up to 200 microns may be included in the mixture as an effectant. On the other hand, very finely ground fillers such as kaolin or silica with a very small particle size up to 0.1 microns may be included in the lead.

The individual components can be brought separately to the required particle size or else be premixed and then comminuted. Thus, a portion of the solid ingredients may be ground individually or in admixture to the desired particle size and then blended with other ingredients. In particular, particles of larger particle size, e.g. Pearls are added at the end of the finely ground mixture.

The mine contains at least one filler. The filler forms the base of the mine and is the carrier for the colorant. The filler contributes to the removal properties of the mine. It should allow a good application and should make the mass slippery. Suitable fillers are kaolin, talc, carbonates such as calcium or magnesium carbonate, silicas such as silica, or aluminum dioxides, boronitrides, synthetic fluorophlogopites, starches such as corn or rice starch, mica, zeolites, nylon or polyamide based fillers, silicone based fillers , Cellulose, acrylate-based fillers such as polymethyl methacrylate, micropowders such as high-melting polyethylene waxes in powder form, and mixtures of two or more of these fillers.

An essential component of a powder mine is the colorant. The colorant may be an organic or inorganic dye. Colorants also include effect substances, such as glittering or lustrous powders or particles, or also commercially available as Pearls white, transparent or colored spherical or pearl-shaped particles. For example, insoluble pigments and / or organic soluble dyes can be used for staining. In this way, any desired color tone can be generated. A mine according to the invention generally comprises at least one pigment or a mixture of pigments and / or one or more effect substances. Here, the pigments and effect substances usually used for powder minerals can be used in the usual amounts. Examples of pigments are inorganic oxides such as iron oxides, manganese violet, uramarine, titanium dioxide. Organic dyes such as carmin or water or solvent-soluble cosmetically acceptable dyes may also be used. Frequently used as effect materials are phyllosilicates, such as mica, which may be coated or uncoated.

To keep the fillers and pigments together, at least one binder is included. The binder may be water-soluble or solvent-soluble. Suitable binders are, for example, cellulose and cellulose derivatives, polyamides, polyacrylates, alginates, layered silicates, starch and starch derivatives, polysaccharides such as cyclodextrin or sugar derivatives. Frequently, cellulose derivatives are used as binders.

The mine may contain other auxiliaries and additives. Examples of excipients are preservatives, lubricants that make application more pleasurable, and materials that serve to adjust the hardness of the refill. These include stearates, such as calcium or magnesium stearate, glycols, esters, polyethylenes, etc. Another example is preservatives.

From the solid powdery constituents of the mine, a dough-like lead mass is formed by adding a carrier liquid, which can then be shaped. Carrier liquid can be any liquid which is compatible with the ingredients, does not undergo undesirable reactions, can be removed at elevated temperature, is not harmful to skin and mucous membranes, and is preferably environmentally friendly. Suitable solvents are those which are volatile at a suitable temperature, for example those which are volatile at a temperature in the range from 50 to 120 ° C, such as water, hydrocarbon compounds, cyclomethicones, etc. A preferred carrier liquid is water or an aqueous mixture.

The ingredients of the invention are used in suitable amounts. The colorant content depends on the coloring power of the pigments and dyes used and on the desired color depth. The proportion of the colorants, based on the weight of all solid mine components, is usually in a range of 10 to 70% by weight, e.g. 15 to 55% by weight, preferably 23 to 48% by weight. The content of filler is usually in a range of 5 to 80% by weight, e.g. 20 to 70% by weight, preferably 24 to 65% by weight. All percentages given herein are by weight of the finished mine, i. the mine after drying to constant weight.

For pasting the solid ingredients, the carrier liquid is used in an amount that gives a good moldable mass, which is dependent on the type and amount of the other ingredients. The amount of carrier liquid is not critical per se, especially since it does not or substantially does not become part of the finished mine. Such an amount is sufficient to form a good moldable mass but is not so high that the removal is expensive. A range of 5 to 80 wt .-%, based on the mine paste mass has been found to be suitable.

From the obtained after the addition of the carrier liquid wet mass then mines are formed in the usual way. The forming of mines and devices suitable for this purpose are known per se and known devices can be used for the method according to the invention. Good results are obtained using an extruder.

After forming, the mines are passed through a chamber in which they are dusted with a powdery wrapping agent. The wrapping agent should be deposited as evenly as possible on the surface of the mines.

The wrapping agent should melt in the drying phase and encase the surface of the mine. The wrapping agent is therefore a material which is solid at ambient temperature and at elevated temperature in the range of 50 to 120 ° C, e.g. 65 to 95 ° C, preferably 68 to 88 ° C melts, and solidifies on cooling in the form of a film or a crust. Examples of suitable materials are natural and synthetic waxes, hydrogenated vegetable oils, and waxy and / or thermoplastic polymers. Vegetable, animal and synthetic waxes commonly used in cosmetics such as carnauba wax, candelilla wax, beeswax, rice bran wax, hydrogenated castor oil, ozokerite, dammar, shellac, coumarone resins, hydrogenated vegetable oils such as hydrogenated jojoba oil and rosinate are suitable. Further examples of enveloping agents are synthetic beeswax, microcrystalline wax, silicone wax, ceresin, stearyl dimethicones, ester waxes such as behenyl behenates, pentaerythrityl tetrabehenates, fatty alcohols, fatty acids such as performacol and performacide, polyethylene, polypropylene, polyvinyl acetate, polyvinyl acetals, polyglycols, polyethers, polyvinylpyrrolidones, resins, like ketone resins, sucrose esters. It is also possible to use mixtures of the stated materials.

The wrapping agent or mixture of wrapping agents is finely divided, i. they have a particle size in the range of 0.01 to 100 μm, e.g. 0.02 to 50 microns, preferably 10 to 40 microns. The particles should be as small as possible so that they adhere well to the wet mine. Although larger particles, e.g. Flakes could also be applied, this can lead to uneven coating and these are therefore rather not suitable.

To apply the coating powder to the surface of the mine, the mines, after molding, i. in a wet state, passed through a chamber in which the Hüllmittelpulver is applied. The wrapping powder is distributed in the chamber and is "dusted" on the passing mines, corresponding devices are known for this purpose. The application of the wrapping agent is carried out so that the mines are dusted at the desired locations, preferably so that the mines are provided all around and along the entire length with wrapping agent, so that after the drying step, a continuous coating layer envelops the mine.

The wrapping agent may be provided in the chamber in the form of possibly charged dust, mist, or as a powder. When the mines are passed through the chamber, the enveloping agent may settle or accumulate on the surface.

By dusting, it is possible to keep the amount of Hüllmittel low. Depending on the thickness of the mine and the desired thickness of the envelope, the amount of enveloping agent in the chamber, the speed of the refill through the chamber and the swirling of the powder, dust or mist can be adjusted.

In order to obtain the desired effect, the enveloping agent is added in a proportion of 0.5 to 15% by weight, e.g. 0.5 to 10 wt .-% or 1 to 10 wt .-%, preferably 2 to 8 wt .-%, particularly preferably 3 to 6 wt .-% based on the weight of the mine added.

So that the wrapping material adheres well to the surface, it can be charged by corona discharge for a short time. In one embodiment, the wrapping agent is applied with a corona gun. The layer thickness formed with the enveloping agent can be influenced by charge strength and flow rate of the powder.

After the mines have been pollinated, they are fed into a drying apparatus and dried there for a predetermined period of time and at a predetermined temperature. During the drying phase, the liquid added to the slope escapes. The drying period is adjusted so that the liquid does not escape too quickly, as this could adversely affect the structure of the finished mine. The drying time depends on the drying temperature, the thickness and composition of the mines and on the type of carrier liquid. Thicker mines require longer drying times than thin ones, and solvents with a lower boiling point than water evaporate faster than water. Gentle drying is usually preferred. Usually, mines are dried over a period of 8 to 24 hours. In less than 8 hours, drying is either insufficient or too fast. In both cases, no satisfactory result is achieved. A drying time of more than 24 hours has no influence on the final product and therefore only generates unnecessary costs. Very good results were achieved with a drying time of 10 to 18, in particular 12 to 16 hours.

Drying devices for drying mines are well known and these known devices can be used in a conventional manner for drying the inventively dusted mines.

The drying temperature depends on the thickness and composition of the mine and on the melting temperature of the enveloping agent. During the drying process the powder texture is formed from the ingredients of the powder mine under the influence of the drying temperature. Depending on the fillers and binders used, the drying temperature may be in the range from 50 to 120 ° C, the enveloping agent should then be adapted in each case to the drying temperature. The expert can find out with a few routine experiments, the optimal combination of mine ingredients, wrapping agents and drying parameters. Usually, the mines are dried at least until the desired degree of hardness is reached or a moisture / solvent content of less than 0.6% is reached.

During drying, the sputtered wrapping agent melts and spreads over the surface of the mine, stabilizing it without affecting other properties of the mine. Without wishing to be bound by theory, it is believed that the sputtered particles, each of which are very small, are always present in a very small amount at a specific location on the surface where they are directly melted, thereby preventing molten encapsulant penetrate deeper into the mine. Only the pores directly on the surface are filled by the molten encasing agent, which in turn contributes to the adhesion of the coating agent layer to the core of the mines. In this way, a diffusion of the enveloping agent is prevented in the mine core and the application feeling of the finished mine is not affected by the stabilizing Hüllmittel and the outside of the surface resting enveloping agent layer is removed in use by tips.

The mines obtained after drying are so stable that they can be processed for all possible uses, in particular for all purposes normally intended for refills, such as in pens or applicators. Such mines can be inserted into sleeve blanks or used in applicators. You can also be subjected to other usual for mines operations. In particular, the mines are cut in a conventional manner to the desired length.

In one embodiment, the mines are further stabilized by the use of a so-called shrink tubing, ie, by coating a thin polymer shell over the lead and then shrinking so that the polymer shell fits snugly against the lead. Such a polymer shell-protected mine can be processed as a free-standing mine or else used in other application devices. This further stabilization is particularly well suited for very thin mines or very soft mining masses.

Another object of the invention is therefore a stabilized powder mine which consists of a mine core and a sheath of a stabilizing Hüllmittel, wherein the mine core contains at least one colorant, at least one filler and at least one binder, wherein the Hüllmittel from a at a temperature between 50 and 120 ° C meltable wax, waxy substance or polymer, and wherein the proportion of the enveloping agent in the finished mine is less than 15 wt .-%, preferably less than 10 wt .-% and the penetration depth of the enveloping agent in the core is less than 0 , 02 μm.

Such a mine can be prepared by the method described above. Due to its composition, this powder mine has a stability which can not be achieved in prior art refills, at least not without impairing the application properties or high product rejects. The powder mine according to the invention is characterized by a thin stabilizing crust, which adheres only on the outside of the surface of the mine, but not or substantially not present in the core of the mine. If one considers a cross-section of the mine perpendicular to the longitudinal direction, the envelope of wrapping material can only be seen at the outer edge, but not further inside.

A powder refill according to the invention is characterized in that the thickness of the coating is very low, e.g. in the range of 0.05 to 0.2 mm, such as 0.07 to 0.15 mm, and that the penetration depth can be adjusted so that the penetration depth of the enveloping agent into the core for 95% of the enveloping agent not more than 0.05 μm.

Mines which have been provided with prior art methods with a wax coating have e.g. far more than 10 wt .-% wax based on the mass of the finished mine on.

Another object of the invention is an applicator device containing a prepared according to the invention or a mine according to the invention. Application devices, in particular for cosmetic purposes, are well known to the person skilled in the art. For example, cosmetic pencils such as eyebrow pencils, eyeliner pencils, lip contour pencils, kohl pencils, which consist of a sleeve and a refill inserted therein, are known. The sleeve may be made of wood, wood substitute, polymer or otherwise customary in cosmetics materials.

According to the invention, there is thus provided a powdery lead and a process for its production, which makes it possible to use powdered minerals for cosmetic and other purposes with hitherto unattainable application properties. This will make powder mines available for uses they have not previously been able to use.

The invention is illustrated by the following examples.

example 1

It was made a mass for a powder mine. For this purpose, a dry phase of silica, kaolin, mica and / or mica-like components and polymethyl methacrylates, pigments and pearls with a binder phase containing magnesium aluminum silicates, algin, and sorbitan laurate and preservative was kneaded with water to a moist mass. This wet mass was fed into an extruder and, by pressure through the cylinder, mines were forced out of the apparatus.
Core length: 627 mm
Cutting interval: 2 s per 627 mm, or 313.5 mm / s

The extruded from the extruder mines were then passed into a chamber in which permanently finely divided Hydrogenated Castor Oil with a melting range of 85-88 ° C circulated as a wrapping agent, so that the mine was evenly coated by this powder. The layer thickness of the shell material was adjusted by the amount of enveloping agent in the chamber and the circulation speed as well as the speed of movement of the mines. For the coating a Koronapistole was used, as it is also used for the application of car paint. Charge strength and flow rate were adjusted so that the desired layer thickness was achieved.

After leaving the chamber, the dusted mines were dried in a drying oven at a temperature of 90 ° C for at least 8 hours to constant weight.

The dried mines were then cut to the desired length and then provided with a shrink tube.

For mines made in a comparative experiment with the same composition and method, but without the addition of the wrapping agent, it was not possible to cover a shrink tube as the minerals crumbled. There were also problems with cutting to length.

The finished mines were then placed in wooden sleeve blanks and glued. After decorating and lace finished pens were obtained, which were very easy to apply to the skin, provided a colorful order, the order was perceived as very pleasant.

Example 2

From the ingredients listed in Table 1 below, mining weights were prepared. Table 1 ROHSTOFFBEZEICHNUNG [INCI] PARTS BY WEIGHT pigments 71.650 water 30,001 Filler, eg Synthetic Fluorophlogopite, kaolin 20.410 Moisturizer, eg pentylene glycol 17.970 silica 10,480 Optical modifier, eg polymethyl methacrylate beads 10,470 Plasticizer, eg, caprylyl glycol; Dipropylene glycol; Glyceryl caprylates 1,899 Preservatives, eg dehydroacetic acid 0,800 Emulsifier, eg sorbitan laurate 0,610 Thickener, eg Mg-Al-silicate, algin 0,500 pH modifier, eg Citric Acid 0,420 Flavorings, eg triethyl citrate 0,407 TOTAL QUANTITY 165.617

Mines with a diameter in the range of 3.77 mm to 4.08 mm were extruded from the massecuite, the pre-pressure being in the range of 55 to 65 bar. The speed of the extruded mine strand was about 310 mm s ^-1 . The enveloping agent was electrostatically charged at a voltage of 45 kV and at a current of 4.5 μA. The electrostatically charged enveloping agent adhered to the mine strand upon contact. Non-adherent enveloping agent was aspirated in the chamber. After leaving the chamber, the coated mine strand was cut to length, with mine pieces each having a length of 627 mm were obtained. The pieces of mine were placed on a plate and dried in a drying oven at 90 ° C for 16 hours. The mines after drying had a diameter in the range of 3.85 to 3.95 mm.

As described in Example 1, the mines were inserted into sleeve blanks and glued. The sticks obtained were used to draw a line on the skin of a test person. The application was perceived as very pleasant. The line was colorful.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• EP 2133214 [0007]
• EP 836846 [0008]

Claims (15)

Process for producing a powder mine, wherein a. at least one colorant, at least one filler and at least one binder are mixed with a carrier liquid, b. be formed from the wet mass mines, c. the mines formed in step b) are passed through a chamber in which they are exposed to a powdery wrapping agent, and d. The dusted mines are passed into a drying device and dried there. Method according to Claim 1 , characterized in that the colorant comprises at least one pigment which is in powder form. Method according to one of the preceding claims, characterized in that the enveloping agent is a meltable at a temperature of 50 to 120 ° C wax and / or polymer. Method according to one of the preceding claims, characterized in that the enveloping agent is added in a proportion of 0.5 to 10 wt.% Based on the weight of the mine. Method according to one of the preceding claims, characterized in that the shaping of the mines takes place in an extrusion device. Method according to one of the preceding claims, characterized in that the pollination of the mines is carried out with the enveloping means with a corona gun. Method according to one of the preceding claims, characterized in that the dusted mines are dried over a period of 8 to 24 hours at a temperature of 50 to 120 ° C. Method according to one of the preceding claims, characterized in that after drying the mines are wrapped with a shrink tube. Powder mine obtainable by a process according to one of the preceding claims. A stabilized powder refill consisting of a refining core and a sheath of a stabilizing sheath, wherein the refining core contains at least one coloring agent, at least one filler and at least one binder, the shedding agent being a wax, waxy wax meltable at a temperature between 50 and 120 ° C Substance or polymer, and wherein the proportion of the enveloping agent in the finished mine is less than 10 wt .-% and the penetration depth of the enveloping agent in the core is less than 0.02 microns. Stabilized powder mine after Claim 10 wherein the wrapper has a thickness in the range of 0.05 to 0.2 mm and / or wherein the penetration depth of the wrapping agent into the core for 95% of the wrapping agent is not more than 0.05 μm. Powder Mine after one of the Claims 9 to 11 , characterized in that the mine is wrapped with a shrink tube. Powder Mine after one of the Claims 9 to 12 , characterized in that it is a self-supporting mine. Use of a powder mine according to one of Claims 9 or 13 for the production of a cosmetic pen. Use after Claim 14 , characterized in that the mine is used as a self-supporting mine in a rotating device, or is inserted as a pencil lead in a blank.