Method for making a marbled concrete candle holder

Description

2 The pressure here is so high that the individual rock grains deform plastically. D1 further describes that patterns can be created by layering differently colored base materials before compressing them. The document DE102007016341(D2) describes a method for manufacturing a vessel with a decorative effect. In this method, a dye is applied to a lump of moldable material before it is placed in the molding unit. Subsequently, the material is formed into a mold, whereby the mold parts, a pot-shaped part and a stamp, can rotate relative to each other to distribute the dye. The document EP1166983(D3) describes a method for producing decorated ceramic vessels. In this method, a lump of clay is pressed into a metal mold, which consists of a fixed lower part and a rotating upper part. During the closing of the mold, but before the final position is reached, a decorative suspension is sprayed into the gap between the mold parts.Due to the rotation of the upper part, this suspension is unevenly distributed over the surface, resulting in a unique, handmade-looking pattern. The techniques used lead to uneven pigment distribution and undesirable visual effects, which reduces the aesthetic appeal of the finished products. It is also a challenge to find the right balance between the amount of pigments and the mechanical properties of the concrete mix. There is therefore a need for an improved method that can facilitate the production of concrete containers with attractive patterns, while ensuring the quality and consistency of the finished products. SUMMARY OF THE INVENTION In a first aspect, the invention concerns a method for manufacturing a concrete container, a specific concrete candle holder, in which a pigment is added to the concrete mixture to create a flame pattern. The process involves applying pigment to the concrete mixture in a container, placing the mixture in an outer mold, and inserting an inner mold.By rotating the inner and outer molds relative to each other, the pigment is spread over the surface, resulting in a unique visual flame pattern that is integrated into the concrete mixture on multiple layers and BE2024 / 5964 3 levels, and not just on the surface, which is common in external decorations. The method uses specific ratios of pigments and concrete mixture, and the rotation angle depends on the mass of the concrete mixture, ensuring a consistent and repeatable pattern. Advantages of the invention are, in the first instance, an improved way to apply a permanent and aesthetically pleasing flame pattern, and additionally, more efficient use of raw materials. Further improvements being considered include the use of transparent molds, which allow visual inspection of the pigment pattern, and the ability to use different turning angles10 offers more design freedom for unique patterns. The use of lubricants facilitates demolding, while the compaction method contributes to a more homogeneous concrete mixture.The method also improves the durability of the candle holder by applying an impregnation layer after demolding. 15 Furthermore, the invention concerns a concrete holder obtained according to the method according to the first aspect of the invention. DESCRIPTION OF THE FIGURES 20 Figures 1 to 3 show side views of inner and outer molds that can be used for possible forms of execution of the method according to the invention. Figure 4 shows a top view of an inner and outer mold that can be used for a possible form of execution of the method according to the invention. Figure 5 shows a possible design of a concrete holder with a candle, in which the intended “flame pattern” is visible on the outer casing of the holder.30 DETAILED DESCRIPTION “A”, “the” and “it” in this document refer to both the singular and the plural unless context clearly implies otherwise. For example, “a segment” means one or more than a segment.BE2024 / 5964 4 When “approximately” or “around” is used in this document for a measurable quantity, a parameter, a duration or moment, and the like, variations are meant of + / - 20% or less, preferably + / - 10% or less, more preferably + / - 5% or less, even more preferably + / - 1% or less, and even more preferably + / - 0.1% or less than the quoted value, insofar as such variations apply to the described invention. However, this must be understood to mean that the value of the quantity for which the term “approximately” or “around” is used is itself specifically disclosed. The terms “comprising”, “comprising”, “consisting of”, “consisting of”, “providing with”, “contain”, “containing”, “include”, “containing” are synonyms and are inclusive or open terms that indicate the presence of what follows, and that do not exclude or prevent the presence of other components, characteristics, elements, members, steps, known from or described in the standard technique.15 The quotation of numerical intervals through the endpoints includes all integers, fractions and / or real numbers between the endpoints, including these endpoints. The term "concrete mixture" refers in the present invention to a mixture of cement, aggregates (such as sand and gravel), water and possibly additives, which is used to form concrete products. The mixture may also contain pigments to create a visual effect, such as a flame pattern. Preferably, the concrete mixture consists of sand in a weight percentage between 55 and 80%, preferably between 60% and 75%, and in a third preference between 65% and 70%. The mixture may include additives such as plasticizers, in limited quantities. Cement then substantially forms the remainder. The sand may consist of one or more types or colors, to obtain desired colors and / or coarseness. Preferably the sand is washed with a grain size of maximum 2 mm. 30 In the present invention, the term "pigment" refers to a colored substance added to the concrete mixture to obtain a specific color or pattern.The pigment can, for example, consist of chromium oxide, titanium dioxide, cobalt oxide, or iron oxide. The amount of pigment lies between a minimum of 0.05 grams and a maximum of 10 grams per kilogram of concrete mixture. Preferably, the pigment is dark, such as black, brown, blue, grey, green, etc. BE2024 / 5964 5 The "outer mold" is a form or template into which the concrete mixture is poured to define the outer dimensions of the concrete container. The diameter of the outer mold corresponds to the desired outer diameter of the concrete container to be formed. 5 The outer mold can take on various forms on the inside, varying from cylindrical, conical, (frusto)conical, rectangular, cubic, prismatic, (frusto)pyramidal, etc., or sections thereof. However, the outer mold can just as well have a more complex shape, such as spherical, oval, or sections thereof (such as a spherical cap or spherical disc). The outer mold can also be composed of two or more of the 10 above-mentioned shapes, such as, for example, matchstick-shaped (cylindrical with a spherical cap).Preferably, the inner shell (thus independent of a bottom and / or top surface) is smooth (or, mathematically speaking, defined by a function whose derivative is continuous). This allows the flame to be spread optimally over a long zone.15 The "inner mold" refers to a shape that is placed centrally in the outer mold and that determines the internal dimensions of the concrete container. The inner mold has a diameter that corresponds to the desired inner diameter of the container. 20 The inner mold can take on various forms on the outside, varying from cylindrical, conical, (frusto)conical, rectangular, cubic, prismatic, (frusto)pyramidal, etc., or sections thereof. However, the inner mold can just as well have a more complex shape, such as spherical, oval, or sections thereof (such as a spherical cap or spherical disc). The inner mold can also be composed of two or more of the above-mentioned shapes, such as, for example, matchstick-shaped (cylindrical with a spherical cap).Preferably, the outer shell of the inner mold (thus separate from a bottom and / or top surface) is smooth (or, mathematically speaking, defined by a function whose derivative is continuous), as with a conical, fructoconical, or cylindrical shape, given that this simplifies rotation with respect to the outer mold.30 The term "push force" (D) in the present invention refers to the force exerted to press the inner mold into the outer mold to a certain depth. This force is at least 40 N and is directed substantially along the longitudinal axis. 35 The term "rotation angle" refers to the angle through which the inner mold and the outer mold are rotated relative to each other around the longitudinal BE2024 / 5964 6 axis. The rotation angle is at least 90° and can increase to a maximum of 720°, preferably between 150° and 600°. The "lubricant" refers to a substance, preferably a vegetable oil, which is applied to the inside of the outer molds and / or the outside of the inner mold to facilitate the demolding of the holder.The "curing" of the concrete container refers to the process whereby the concrete mixture acquires its strength and durability through chemical reactions that take place over a period of at least 6 hours and at most 72 hours at a temperature between 15°C and 35°C. The "finishing layer" is an additional layer that can be applied after demolding the concrete container to protect or enhance the surface. This may include an impregnation layer to improve the durability and aesthetics of the container. In one aspect of the invention, a concrete candle holder is created by an innovative process in which pigments are integrated into the concrete mixture in a unique way. This process begins with the addition of a pigment to the top surface of a concrete mixture. The pigment is spread evenly over the surface, after which the top layer of the mixture is placed in an outer mold. This process of pigment addition, spreading, and pouring into the mold is repeated until the desired volume is reached.Next, an inner mold is inserted with appropriate force and rotated relative to the outer mold. This rotating movement ensures that the pigment spreads in a unique, visually appealing pattern, such as a flame effect. This effect gives the concrete candle holder an aesthetic and decorative value. Specifically, a stone concrete mixture is provided, in which pigment is applied in one or more doses. These doses are applied to the top surface and optionally (partially) spread over a part of the top surface of the concrete mixture to create a first step towards the 'flame'. Subsequently, this top layer is partially placed in an outer mold, and the process of pigmenting (and optionally spreading) and transferring the top layer to the outer mold can be repeated until the required volume of pigmented concrete mixture is reached in the outer mold.Next, an inner mold is inserted into the concrete mixture to a desired depth, so that the volume between the inner and outer molds assumes the dimensions of the concrete container, and finally the inner and outer molds are rotated relative to each other around a central axis (which is typically the same for both), whereby the pigment is spread out as far as possible to create the desired 'flame pattern'.5 This rotation is performed under a minimum force of 40° and at a minimum rotation angle of 90°, and preferably more. Note that the concrete mixture may further comprise other pigments that are already mixed into the concrete mixture. In what follows, these are no longer considered as pigment10, but as part of the concrete mixture and serve in the general colour formation of the concrete mixture itself, but have no influence on the flame, except possibly as a contrast. The concrete container ultimately obtained can have a wide variety of geometric shapes on the outer and inner sides.The outside largely corresponds to the inside of the outer mold and the inside to the outside of the inner mold. Possible examples for the outside are typically somewhat more varied, given that rotation is less of an issue there, and it is the inner mold that moves the concrete mixture.20 The innovative aspect of this method lies in the possibility of creating distinct visible patterns at different depths in the candle holder. By carefully building up and treating the layers, the layer cohesion is increased, which contributes to the structural integrity of the candle holder. This method25 offers significant advantages over traditional methods, where pigments are often not evenly distributed or do not achieve the desired aesthetic effects. In a further form of execution, the pigment can be applied in varying concentrations30, resulting in different intensities of the flame pattern. For example, the pigment can be added in a concentration of 0.025% to 1% by weight of the total concrete mixture.Preferably, the concentration lies between 0.05% and 0.5%, more preferably between 0.075% and 0.35%, even more preferably between 0.01% and 0.3%, and most preferably between 0.05% and 0.25% or between 0.1% and 0.2 weight percent. Through these variations, the user can achieve a wide range of aesthetic effects, making the candle holder not only functional but also visually appealing. The rotating movement between the inner and outer molds can be further adjusted to create different patterns. For example, the rotation angle can vary from 30 degrees to 900 degrees. Preferably, a rotation angle of 45 degrees to 810 degrees is used, more preferably between 60 and 720 degrees, even more preferably between 75 and 105 degrees, and most preferably between 90 and 630 degrees. These adjustments in rotation angle offer the possibility to create unique patterns and textures that further contribute to the aesthetic appeal of the candle holder. In addition, the speed of rotation can be varied to achieve different effects.The average rotation speed can, for example, vary from 5 revolutions per minute (rpm) to 60 rpm. Preferably, the speed lies between 1015 rpm and 50 rpm, more preferably between 15 rpm and 40 rpm, even more preferably between 20 rpm and 30 rpm, and most preferably between 25 rpm and 28 rpm. This variability in speed offers even more possibilities for creating unique and attractive patterns in the candle holder. 20 Through this detailed and innovative approach, the invention offers a versatile and aesthetically appealing solution for manufacturing concrete candle holders that are both visually appealing and structurally robust. 25 In a preferred execution form, the mixed concrete mixture comprises an external quantity of pigment per 1 / 2 mixed concrete mixture that lies between 0.06 and 5, preferably between 0.08 and 2.5g, preferably between 0.1g and 1.0g, with an even further preference between 0.11 and 0.5g, and with an even further preference between 0.12 and 0.2g.30 In a preferred execution, the method involves a rotational movement of the inner mold relative to the outer mold, whereby the rotational movement is limited to at most 720°, preferably at most 600°. This limitation of the rotational movement contributes to improved durability and stability of the resulting concrete candle holder. By limiting the rotation, excessive stress on the concrete mixture during the molding process is avoided, which results in a stronger end product. BE2024 / 5964 9 Furthermore, this preferred version offers the possibility to create unique and attractive patterns by varying the rotation angles. The use of 5 different rotation angles enables the user to realize a wide range of aesthetic designs, which contributes to the diverse attractiveness of the concrete candle holders. The variation in patterns can be achieved by adjusting the rotation angle within the specified limits of 90° to 720°, whereby each angle within this range can have a unique visual impact on the final pattern.It is further advantageous that this method offers a certain degree of flexibility in the production process, allowing producers to respond to the specific wishes of the consumer regarding the design and aesthetics of the candle holder. The ability to choose from a range of rotation angles makes it possible to adapt production without compromising the structural integrity of the candle holder. In a more preferred design, the rotation angle of the turning movement can be further limited to between 180° and 600°, preferably between 200° and 550°, which contributes even more to controlling stress levels during the forming process. This results in an even more robust candle holder that is resistant to cracking or other structural defects. The most preferred turning movement would then be dependent on the dimensions of the holder (height, diameter, mass), which offers an optimal balance between pattern variation and structural integrity.This methodological approach not only improves the functionality of the candle holder, but also makes a significant contribution to the aesthetic value of the end product, making it an attractive and more versatile product for the consumer. In a preferred version, the invention offers the possibility to rotate the inner and outer molds in different ways relative to the card. This rotation capability offers designers more freedom to create unique and personalized flame patterns on the candle holder. By rotating the molds at different angles, variations in the flame pattern can be realized, resulting in a wide range of aesthetic designs. Preferably, the rotation of the molds can be performed manually by the user, allowing direct control over the design process. Alternatively, the rotation can be driven mechanically, for example by a motor drive, to guarantee consistent and repeatable patterns.Due to the flexibility in both rotation angle and pigment ratio, this preferred version of the invention offers an extensive set of possibilities for creativity and customization, making the product more attractive to a wide range of consumers with different aesthetic preferences. In a preferred design form, the concrete candle holder is designed to improve its structural integrity by adjusting the force applied during the casting process. This force is optionally proportional to the mass of the concrete mixture, calculated using a suitable equation. By applying this method, the robustness of the holder is significantly improved, guaranteeing that it can withstand various stresses during use. Preferably, the applied force is precisely tuned to different mass ranges of the concrete mixture.The applied force (in kg) can, for example, be adjusted to a range of ratios relative to the mass of the concrete mixture (in kg) in the outer mold, starting at a lower threshold value of 10% of the mass of the mixture and continuing up to an upper threshold value of 200%. More preferably, the force lies between 50% and 500%, even more preferably between 75% and 400%, with a third preference between 100% and 300%, or between 125% and 275%, and most preferably the force lies between 150% and 250% of the mass of the mixture. It should be noted here that with a larger mass (e.g. 20 kg tends towards a ratio between 75% and 150%) of the concrete mixture in the outer mold, the force-relative ratio of mass closer to the lower limit lies than at a lower mass (e.g. 2 kg tends towards a ratio between 200% and 400%). 35 This proportional force application optionally ensures that the concrete mix is ​​compacted uniformly, thereby minimizing air pockets and inconsistencies in the material BE2024 / 5964 11.Such uniform compaction is preferable for preserving the aesthetic and functional qualities of the candle holder. The application of this method ensures a consistent distribution of pigment in the concrete, thereby improving the visual appeal of the flame pattern on the surface. Furthermore, with higher masses, more force is required to enable rotation and achieve the desired effect without the process being too slow or failing to produce the desired aesthetic result. Moreover, the proportional force application can be related to the specific characteristics of the concrete mix used, such as viscosity and curing time. By taking these factors into account, the method can be tailored to different types of mixes, offering flexibility in the production process. This adaptability is particularly advantageous when working with different pigment types and concentrations, ensuring that the desired flame pattern is consistently achieved.15 In a preferred load-bearing form, the concrete mix contains a weight percentage of plasticizers between 0.05 and 2.0, preferably between 0.1 and 1.5, preferably between 0.15 and 1.25, almost even further preferred between 0.25 and 1.0, almost even further preferred between 0.35 and 0.75, almost even further preferred between 0.45 and 0.7, almost even further preferred between 0.5 and 0.65, such as between 0.525 and 0.625 or between 0.55 and 0.6. In a preferred load-bearing form, the thrust force (D) in N relates to the mass (M) of the concrete mixture in kg, according to a linear equation D = A ∙ M 25 + B, where A lies between 6 and 20, preferably between 8 and 16, and where B lies between 25 and 90, preferably between 32 and 70. With further preference, A lies between 10 and 14, such as between 11 and 13, or 11.5 and 12.5. With further preference, B lies between 35 and 60, with even further preference between 40 and 55, such as for example between 45 and 50. It was noted that with larger masses and volumes of concrete mixture, more thrust force was needed to create the flame pattern, because the rotation had to find an equilibrium between abruptness (good spreading) and gradualness (consistent flame).35 In a preferred load-bearing form, the partial surface area over which the pigment is distributed in the container is limited to a maximum of 50% of the total BE2024 / 5964 12 (visible) top surface of the concrete mixture therein, preferably a maximum of 30% or even 25%, 20%, 15% or lower. Note, it is of course possible to artificially reduce this percentage by using a very large top surface area, but account must be taken of the fact that the ratio of pigments to concrete mixture must remain in accordance with the desired quantity. In a preferred load-bearing form, the pigment is partially spread over the top surface of the concrete mixture in the container. In this way, the pigment is better dispersed and it is ensured that the flame has a diffuse character.In a preferred load-bearing form, the single-mix concrete mixture is provided in the outer mold with the upper surface of the top layer at least partially oriented towards the inner walls of the outer mold, whereby at least 25%, and preferably at least 30%, 35%, 40%, 45%, 50%, 60%, 70% or more, is oriented towards the inner side walls of the outer mold. In this way, it is ensured that the pigment is clearly visible on the outside of the concrete container. 20 In a preferred load-bearing form, the angle of rotation (H) relates to the mass (M) of the concrete mixture in the outer mold according to a linear equation H=C∙M+E, where C lies between 10 and 35, preferably between 15 and 30, and where E lies between 150 and 240, preferably between 175 and 215. For larger sizes (mass / volume), it was noted that a larger angle of rotation was necessary to obtain the desired visual result. In a further preferred embodiment, the force applied during the casting process is controlled by mechanical means, such as a hydraulic press or an automated system.This control mechanism optionally makes it possible to make precise adjustments, so that the optimal force is applied in every case, thereby maximizing the structural integrity and visual quality of the end product. However, this can also be done manually based on the experience of the operator. 35 In a preferred design, the invention concerns a concrete candle holder in which the inner mold and the outer mold are rotated relative to each other BE2024 / 5964 13 while the inner mold is inserted with an appropriate force. This overlapping execution of rotating and pushing significantly shortens the total production time of the candle holder. Optionally, the rotation of the inner mold can take place in a direction opposite to the direction of the rotation of the outer mold, creating a more defined flame pattern on the surface of the candle holder. In principle, one mold can be held stationary, and only the inner or outer mold rotated, but both can just as well perform a rotation in the opposite direction.In the highest preference, the force is applied to the lower or upper surface of the inner and / or outer mold, and is automatically and substantially evenly redistributed over the lateral surfaces of the mold(s), and thus onto the pigmented concrete mixture lying against it. In another preferred design, the amount of pigment added to the upper surface of the concrete mixture can vary to create different shades and intensities of the flame pattern. This can be achieved by applying the pigment in layers, where each layer contains a different concentration of pigment. This allows the candle holder to be adapted to different decorative styles and user preferences. In a preferred design, the invention comprises a concrete candle holder in which the efficiency of pigment use is optimized. Optionally, the use of pigments in the concrete mixture can lead to more efficient use of raw materials and lower production costs.It is advisable to add pigment to the top surface of the concrete mixture before it is placed in the outer mold. This process can be repeated until a sufficient volume is reached in the outer mold, resulting in a visually attractive flame pattern. In a further preferred design, the candle holder can be manufactured using renewable or recycled materials, which contributes to the sustainability of the product. This can result in a more environmentally friendly production process and a lower ecological footprint. The choice of materials and techniques can optionally be adapted to the specific aesthetic and functional requirements of the user, making a wide range of designs and applications possible. BE2024 / 5964 14 In a preferred finish, the concrete candle holder is manufactured with a pigment that is integrated into the concrete mixture in a consistent manner. This results in an improved flame pattern that enhances the aesthetic appeal of the candle holder.Optionally, the pigment can be added in various colors, depending on the desired visual effects and decorative style.5 In a further preferred design, the exterior can have a smooth or textured surface, which influences the final pattern of the pigment on the candle holder. A textured surface, for example, can add an extra dimension to the flame pattern, further enhancing the visual effect.10 By using these methods and parameters, the concrete candle holder can be not only functional but also aesthetically pleasing, with a consistent and visually appealing flame pattern that improves the overall appearance of the product.15 By carefully dosing the pigment, a wide range of color intensities can be achieved, from subtle shades to vibrant colors. This adjustment in color intensity offers significant advantages when designing aesthetically pleasing candle holders that suit various interior styles and personal preferences.Moreover, variation in pigment concentration can contribute to the creation of unique and artistic flame patterns, which further enhances the appeal of the final product. 25 This approach offers the user the flexibility to adapt the design of the candle holder to specific aesthetic requirements, while the process remains simple and repeatable. By using the preferred designs described above, one can efficiently produce candle holders with a high degree of artistic value and variation in color pattern.30 In a preferred design, the method for manufacturing a concrete candle holder includes a compaction method that ensures a more homogeneous concrete mixture. This optionally results in a stronger and smoother finish of the candle holder. The compaction method can preferably consist of the use35 of vibrations or other mechanical techniques that help the concrete mixture to distribute evenly and minimize air bubbles.This process can optionally BE2024 / 5964 15 be carried out at different frequencies and amplitudes, depending on the specific composition of the concrete mix and the desired final quality of the candle holder. Preferably, the compaction method can be applied for a specific duration, which may be variable depending on the circumstances. Optionally, this duration can vary from a few seconds to several minutes, whereby a preferred duration of 30 seconds to 5 minutes can be used. Preferably, this duration can lie between 1 and 4 minutes, even more preferably between 2 and 3 minutes, and most preferably about 2.5 minutes.10 The benefits of applying such a compaction method are optionally diverse. A more homogeneous concrete mix can preferably result in increased structural integrity of the candle holder, which can extend its durability and lifespan. In addition, a smooth finish can optionally15 offer aesthetic benefits, making the candle holder more attractive to consumers.In a further preferred design, the compaction method can be combined with other techniques, such as the use of specific additives20 that improve the curing process of the concrete. These additives can optionally vary from water-reducing agents to air-entraining agents, depending on the specific requirements of the application. By combining these methods, an even higher quality of the candle holder can be achieved, with improved mechanical properties and aesthetic characteristics.25 In short, the application of a compaction method in the manufacture of concrete candle holders optionally offers significant advantages in terms of homogeneity of the mixture and the finish of the final product. These improvements can contribute to increased customer satisfaction and a30 broader acceptance of the product on the market. In a preferred design, the concrete candle holder is manufactured using a pigment that is incorporated into the concrete mixture.This pigment is locally distributed over the top surface of the mixture before it is poured into the outer mold. Subsequently, the pigmented mixture can be built up in layers by repeatedly applying pigment to the top surface and spreading it out over the mixture. This process can be repeated until the desired volume is reached. In a further preferred execution, the mass of the concrete mixture used in the outer mold itself can also vary, depending on the desired thickness and strength of the candle holder. The mass can preferably range between 1,000 and 30,000 grams, in various sizes. By combining these variations in mass with the specific turning angles, different patterns and structures can be created, resulting in unique custom-made candle holders. 10 The ability to adjust both the rotation angle and the mass gives the user the freedom to optimize the aesthetic and functional properties of the candle holder.This makes the process not only versatile but also attractive for a wide range of applications, from decorative grease to functional designs. The consistency and repeatability of the flame pattern15 contribute to the overall qualities and attractiveness of the end products. In a preferred implementation, the invention involves the use of a lubricant in the manufacture of the concrete candle holder. This lubricant is preferably applied to the inner and / or outer mold, which significantly simplifies the removal of20 these molds after the concrete mixture has hardened. The use of a lubricant reduces the risk of damage to the end product during demolding, which leads to higher product quality and less waste. 25 The lubricant can preferably be silicone-based, but other suitable lubricants such as vegetable oils or synthetic lubricants can also be considered, depending on the specific requirements of the production process.It is desirable that the lubricant is compatible with the concrete mixture and does not have a negative influence on the aesthetic or structural properties of the candle holder. In a further preferred design, the amount of lubricant applied may vary depending on the size and complexity of the mold. For smaller or less complex molds, a thin layer of lubricant may be sufficient, while for larger or more detailed molds, a thicker layer may be necessary to ensure smooth removal. The thickness of the lubricant in BE2024 / 5964 17 can preferably vary from 0.1 mm to 1.0 mm, more preferably from 0.2 mm to 0.8 mm, even more preferably from 0.3 mm to 0.6 mm, and most preferably from 0.4 mm to 0.5 mm. The use of lubricant also offers operational benefits, such as shorter production time because the molds can be removed faster and more easily. This can lead to increased production efficiency and lower labor costs.Moreover, it contributes to the durability of the molds, as friction during removal is reduced, which extends the lifespan of the molds. In general, the use of a lubricant contributes to a more efficient and cost-effective production process of the concrete candle holder. In a preferred execution, the concrete candle holder is manufactured by allowing the concrete mixture to cure within a specific time and temperature, whereby the structural integrity of the holder is improved. The curing process can preferably be carried out at temperatures between 10°C and 40°C, more preferably between 15°C and 35°C, even more preferably between 20°C and 30°C, even more preferably between 22°C and 28°C, and most preferably between 24°C and 26°C. These temperature settings contribute to optimal curing, thereby increasing the durability and strength of the concrete holder. Furthermore, the curing time of the concrete mixture may vary depending on the environmental conditions and the specific composition of the mixture.In a preferred version, the curing time can vary from 12 to 48 hours, preferably from 18 to 36 hours, even more preferably from 20 to 3025 hours, even more preferably from 22 to 28 hours, and most preferably from 24 to 26 hours. By adhering to this duration, an even distribution of pigments and a consistent structure in the container can be ensured. The use of pigments in the concrete mixture also offers aesthetic advantages.30 By applying the pigments to the top surface of the mixture and then spreading them evenly, an attractive flame pattern can be created. In a preferred version, pigments can be selected from a wide range of colors, with a preference for natural shades such as red, orange, or yellow, which makes the flame pattern stand out even more.35 BE2024 / 5964 18 In a preferred version, the method involves improving the resistance of the candle holder to moisture absorption by applying an impregnation layer after demolding, thereby improving durability.Optionally, the impregnation layer can consist of a material specifically chosen for its moisture-resistant properties. More preferably, the impregnation material can contain a hydrophobic substance that effectively reduces moisture penetration. The application of the impregnation layer can preferably be carried out once the candle holder has fully cured, ensuring that the substance can bond optimally to the surface. This process can optionally be performed at a temperature preferably between 15 and 30°C, more preferably between 18 and 28°C, even more preferably between 20 and 25°C, and most preferably at approximately 22°C. This choice of temperature can contribute to efficient adhesion of the impregnation layer to the concrete surface. 15 In a further preferred application, the impregnating material can be applied with a brush, roller or by immersion, whereby each method offers unique advantages depending on the specific geometry and finish of the candle holder.The use of a brush, for example, can offer more control over application on complex surfaces, while immersion can promote uniform coverage. Optionally, the thickness of the applied impregnation layer can vary, preferably between 0.1 and 1.0 mm, more preferably between 0.2 and 0.8 mm, even more preferably between 0.3 and 0.6 mm, and most preferably around 0.525 mm. This thickness can offer an optimal balance between protection and material usage. Through the application of an impregnation layer, the candle holder can not only be more resistant to moisture, but also to other environmental factors such as dirt and stains, which contributes to an extended lifespan and aesthetic value of the product. This method offers a versatile approach to significantly improve the functional and aesthetic qualities of concrete candle holders, with a focus on durability and weather resistance. 35 In a preferred version, the candle holder comprises a pigment that is applied in a specific manner to the concrete mixture to create a durable BE2024 / 5964 19 flame pattern.The pigment is preferably applied to the top surface of the concrete mixture and carefully spread out before being placed in the outer mold. This technique ensures that the pigment is evenly distributed and that the flame pattern remains consistent, which enhances the aesthetic appeal of the candle holder.5 Optionally, the pigment can be applied in several layers, with each layer being carefully spread out before the next layer is added. This process can be repeated until the desired volume is reached in the outer mold. By applying the pigment in these layers, the intensity and depth10 of the flame pattern can be adjusted, resulting in a more personalized and unique appearance. In a preferred execution, transparent molds are used in the manufacture of the candle holder, which allow visual inspection of the pigment-borne pattern15, which can significantly improve production consistency.Such transparent molds offer the user the possibility to accurately observe the pigment mixture during the production process and to immediately correct any deviations in the pigment pattern. This allows the user to ensure that the final flame pattern remains consistent and aesthetically pleasing.20 Preferably, the transparent molds are made of a durable and clear material, such as polycarbonate or acrylic, that is resistant to the pressure and stress that may occur during the turning of the molds. More preferably, the material has a thickness between 2 and 5 mm, with the most preference given to a thickness of approximately 3 mm for optimal strength and transparency. The transparency of the molds can also make it possible to test different pigment colors and combinations without having to remove or open the mold, which can further increase the efficiency of the production process.30 In a further preferred design, the transparent mold can be provided with markings or scales that assist in the accurate positioning of the inner mold relative to the outer mold. This can help in achieving a uniform flame pattern over the entire surface of the candle holder. 35 Moreover, such markings can facilitate the process of applying pigment layers by providing visual guidelines for the thickness and placement of each layer. Furthermore, the use of transparent molds can contribute to a reduction in material waste, since the user can immediately see whether the pigment is evenly distributed before the concrete hardens. This can result in a more economical production process, where less material is lost to failed products. Overall, the implementation of transparent molds in the candle holder production process offers significant advantages in terms of quality, efficiency, and sustainability.10 In a preferred finish, sanding the candle holder results in a smoother and more aesthetically pleasing surface. Optionally, sanding can be performed with sandpaper of a grit size preferably ranging between 30 and 160, with a grit size between 40, 15 and 120 being preferred, between 50 and 110 even more, and most preferably between 70 and 100. This sanding can contribute to removing imperfections and improving the overall visual appeal of the candle holder. Preferably, sanding can be performed manually or with the aid of a 20 electric sander, depending on the desired finish and the production volume. In a further preferred execution, sanding can be followed by a polishing process, in which polishing compounds can be used to further refine the surface and obtain a glossier finish. This polishing process can optionally be performed with a 25 polishing pad and a soft cloth to minimize scratches.The resulting smooth surface can also contribute to a better diffusion of the candle light, creating a pleasant ambiance. Furthermore, sanding the candle holder can contribute to increasing the durability of the product by reducing the risk of cracks or fractures that might otherwise occur due to sharp edges or uneven surfaces. In another preferred design, sanding can be integrated as a step in a larger production process, where the sanding takes place after the concrete mixture has hardened but before the application of any BE2024 / 5964 21 surface treatments, such as the application of a protective coating or paint. This can improve the adhesion of such treatments and provide long-lasting protection against wear or environmental influences. In summary, sanding the candle holder can offer not only aesthetic benefits, but also functional benefits, such as improved light diffusion and increased structural integrity.It is a preferred procedure that can significantly improve the overall qualities and attractiveness of the final product. In a preferred version, the candle holder includes a pigment consisting of chromium oxide, titanium dioxide, cobalt oxide, or iron oxide, which are optionally added to the concrete mixture. These pigments ensure a durable and vibrant color, which contributes to the aesthetic design of the candle holder. Optionally, the pigment can be added in different concentrations to achieve variations in color intensity. In a further preferred execution, the pigment can be evenly distributed over the top surface of the concrete mixture before it is placed in the outer mold. This ensures that color consistency is maintained and that the flame pattern created is more pronounced and attractive. The process of adding pigments and spreading them over the surface can be repeated multiple times to create a layered effect, which further enhances the visual appeal of the candle holder.25 In one aspect of the invention, a concrete candle holder is proposed in which a pigment is integrated into the concrete mixture to create an attractive flame pattern. This unique visual effect is achieved by pouring the pigmented concrete mixture into an outer mold and subsequently placing it into an inner mold, whereby the inner and outer molds are rotated relative to each other. This rotation ensures that the pigment spreads over the surface in an artistic and unpredictable manner, creating a consistent and attractive flame pattern. The process begins with the careful addition of pigment to the top surface of the concrete mixture. This top layer is then spread evenly to ensure a uniform distribution of the pigment. BE2024 / 5964 22 The mixture with the pigmented top layer is then poured into the outer mold. This process of adding pigment, spreading, and pouring into the mold is repeated until sufficient volume is reached in the outer mold to form the candle holder.5 Next, the inner mold is inserted into the outer mold with appropriate force to create the desired inner dimensions of the candle holder. It is essential that the force with which the inner mold is inserted is accurately controlled to prevent the mixture from being unevenly distributed or the pigment pattern from being disturbed. After placing the inner mold, it is rotated relative to the outer mold. This rotation is crucial for creating the flame pattern, as it causes the pigment to spread according to a predetermined pattern, which contributes to the aesthetic appeal of the candle holder. In different molds, the amount of pigment can vary to achieve different visual effects. For example, in one mold, the pigment can be added in a ratio of 1% to 10% of the total weight of the concrete mixture, depending on the desired intensity of the flame pattern.Preferably, the pigment ratio lies between 2% and 8%, more preferably between 3% and 7%, even more preferably between 4% and 6%, and most preferably between 4.5% and 5.5%. The rotation angle between the inner and outer molds can also be varied to create different patterns. In one execution mold, the rotation angle can vary from 10 degrees to 90 degrees. Preferably, the rotation angle lies between 20 degrees and 80 degrees, more preferably between 30 degrees and 70 degrees, even more preferably between 40 degrees and 60 degrees, and most preferably between 45 degrees and 55 degrees. 30 The benefits of this invention are significant. In addition to creating a visually appealing product, the use of pigment in the concrete mixture offers the possibility of making candle holders that suit various interior styles and personal preferences. Moreover, the method ensures that the pigment is evenly distributed without the need for extra processing steps35, which increases production efficiency and reduces costs.This BE2024 / 5964 23 innovative approach offers a new dimension to the aesthetic and functional possibilities of concrete candle holders. The method also offers very great flexibility regarding the use of fuel components. Any candle mix (fuel mixture) can be molded according to the method of the present invention. For example, paraffin mixes, paraffin wax mixes, vegetable and animal wax mixes and 100% natural mixes can be made without any necessary additives. Examples of vegetable fuel components are stearin, palm oil, rapeseed oil, sunflower oil, shea butter, corn oil, coconut oil, soybean oil or a combination thereof. The term "paraffin", as used in the text, is intended to mean a mixture of crystalline linear alkanes with 17 to 57 carbon atoms and linear or branched chains, which are solid at room temperature and obtained from natural oil fractions and lignite tar. The general molecular formula of such linear alkanes is CH3(CH2)nCH3.In a preferred form, the fuel components15 are selected from the list of: petrochemical wax, natural wax, or a combination thereof. More specifically, the fuel components can be selected from the list of: paraffin, paraffin wax, vegetable wax, animal wax, or a combination thereof. In the multi-fuel component form, each fuel component is liquefied by heating and subsequently 20 mixed into a mixture of fuel components. Preferably, the fuel components are mixed into a homogeneous mixture, i.e., in a homogeneous mixture, the components are perfectly mixed and preferably indistinguishable from one another, even at a microscopic level. This is necessary to obtain uniformity in the wax mass of the ultimately obtained candle. 25 The present invention will now be described in more detail, with reference to examples or figures that are not restrictive.DESCRIPTION OF THE FIGURES30 Figure 1 shows a side view of the outer surface of an inner mold (1) and the inner surface of an outer mold (2) that can be used in the method according to the invention, in which a volume (3) is defined between the inner and outer molds (1,2) in which the unmixed concrete mixture is present35 prior to the relative rotation of the molds with respect to each other. BE2024 / 5964 24 In this embodiment, the outer mold is conical (on the inner surface) and the inner mold is cylindrical (on the outer surface). Figure 2 shows a side view of the outer surface of an inner mold (1) and the inner surface of an outer mold (2) that can be used in the method according to the invention, in which a volume (3) is defined between the inner and outer molds (1,2) in which the unmixed concrete mixture is present before the molds are rotated relative to each other. In this embodiment, the outer mold (on the inner surface) and the inner mold (on the outer surface) are frustoconical.Figure 3 shows a lateral view of the outer surface of an inner mold (1) and the inner surface of an outer mold (2) that can be used in the method according to the invention, where a volume (3) is defined between the inner and outer mold (1, 2) in which the unmixed starting mixture is present 15 prior to rotating the molds relative to each other. In this embodiment, the outer mold (on the inner surface) is slightly frustoconical and the inner mold (on the outer surface) is convex (cap) shaped. Figure 4 shows a top view of the outer surface of an inner mold (1)20 and the inner surface of an outer mold (2) that can be used in the method according to the invention, in which a volume (3) is defined between the inner and outer mold (1,2) in which the unmixed concrete mixture to be placed prior to the relative rotation of the molds relative to each other. In this embodiment the inner and outer mold (respectively outer and 25 inner shell) are axially symmetrical, such as (frusto) conical, cylindrical, spherical, etc.Figure 5 shows a design of a concrete holder with a candle, in which the intended “flame pattern” is visible on the outer casing of the holder. 30 EXAMPLES The present invention will now be further explained by means of the following examples. The present invention is in no way limited 35 to the given examples or the designs shown.