Process for dyeing pipe braids

Abstract

A method for dyeing cane weaving, in particular rattan or wicker weaving, with natural dyes or coloring agents, wherein the cane weaving is formed by a plurality of flat strands obtained from the outer skin of a plant shoot and interwoven together, the smooth outer skin surface of which is oriented to one side, thus forming an upper smooth surface and a lower rough surface of the cane weaving, comprises the following steps: a) immersion of the cane weaving in a first immersion bath of an aqueous solution of a natural tanning agent and bathing of the cane weaving in this aqueous tanning agent solution for a first predetermined period; b) removal of the cane weaving from the first immersion bath and preferably allowing the remaining aqueous tanning agent solution to drip off;c) Applying a natural dye or color-active reagents to the reed mesh for a second predetermined period.;

Description

[0001] This PCT application claims priority from German patent application DE 10 2023 118 877.1 filed on 17 July 2023. TECHNICAL FIELD

[0002] The present invention relates to a method for dyeing cane braiding according to the preamble of claim 1. It further relates to the use of a dyeing method for braided cane braiding according to the preamble of claim 20 and alternatively claim 21, as well as to a cane braiding according to the preamble of claim 22. BACKGROUND OF THE INVENTION

[0003] Cane weaving, such as Viennese wickerwork, is used as a natural raw material for covering the seat and / or backrest of seating furniture in its inherent light, natural color. For design reasons, the goal is to be able to use cane weaving in different colors in furniture construction. The cane weave should retain its technical properties while also being able to take on a different color, which in turn meets the requirements for seat upholstery in terms of its technical properties (lightfastness, perspiration resistance, abrasion resistance).

[0004] While dyeing the fiber strands used as raw material for the production of the cane braiding would be technically possible, it is not desirable for quality reasons, as the finished braided cane braiding semi-finished product is sourced from suppliers to the furniture industry, over whose processing quality the furniture manufacturer has virtually no influence. To eliminate the problem of constant complaints from the outset, the aim is for the finished cane braiding semi-finished product to be dyed by the furniture manufacturer under their own quality responsibility.

[0005] While it would be logical to apply color (varnish, stain) to the canework, this method would not include the areas of the canework where the fiber strands overlap. If the fiber strands of the canework shift relative to each other over time, these uncolored areas become visible, rendering the overall appearance of the canework unsightly. The same essentially applies to the use of stains. Furthermore, a varnish applied to the canework can be rubbed off over time or even chip off due to the dynamic, alternating stresses the canework is subjected to during use of a piece of seating equipped with it. Therefore, the canework should be dyed throughout.

[0006] The fiber strands of the cane weave are obtained from the rattan palm and are commonly known as rattan. The fiber strands of the cane weave are obtained exclusively from the outermost layer, the skin, of a plant shoot. This skin layer is characterized by a smooth surface and high strength, making it ideal for use as seat covering, and its smooth surface also forms the visible side of the cane weave. However, this surface appears to possess no capillaries or fibers, which increases the difficulty of permanently incorporating a dye directly into the surface from the outside.

[0007] The underside of the fiber strands, on the other hand, has a standard fibrous structure, similar to that found in rattan furniture. Incorporating a dye into this material is unproblematic, but the dye does not penetrate evenly into the surface layer. STATE OF THE ART

[0008] From DE 479 801 A, which deals with the bleaching of chair cane and rattan, it is known that the outer surface of the chair cane is resistant because of the presence of silica deposits there.

[0009] DE 736 022 A deals with a two-stage process for dyeing dried reeds or other plant parts, whereby the material to be dyed is first treated with a solution of water-soluble salts and then with an aqueous solution of an alkaline agent.

[0010] EP 1 012 374 B1 relates to a method for treating a wood substrate, which, in a first step, is brought into contact with an aqueous solution containing a metal salt solution and, in a second step, is brought into contact with an aqueous solution containing a solution of an oxidizing agent. The respective residence times of the wood substrate in the solutions are to be such that the substrate is colored or stained.

[0011] EP 3 047 946 A1 shows and describes a process for treating rattan, in which a rattan rod with longitudinal tubes is connected to a piping system through which it is pressurized with a liquid. This liquid, which is introduced into the rattan rod under pressure, can be, for example, paint. Through this process, the paint is forced from the inside out through the wood of the rattan rod and through its capillaries, coloring the rattan throughout.

[0012] EP 3 464 401 B1 relates to an aqueous polymer dispersion and a production process therefor, as well as its use for the production of wood / bamboo / rattan exterior coatings. Coloring the material with a natural dye is not intended.

[0013] CN 1 09 623 987 A relates to a process for the production of bamboo products, namely woven red bamboo. Bamboo discs are immersed in a salt solution for several days, causing the bamboo cells to lose water and salt to accumulate within them, which is said to be beneficial for the adhesion of dyes.

[0014] DE 561 455 A is directed to a process for finishing veneer wood, in which the wood is first bleached with a hypochlorite solution containing high chlorine content. Subsequently, it is washed out with water and subsequently treated with hydrogen peroxide.

[0015] CN 1 10 509 368 A discloses a process for producing a complex panel made of plant fibers, plant polyphenols, and metal salts. The metal salt is introduced into the plant fibers, causing a color change.

[0016] From CN 1 10 480 764 A a process is known for producing a composite from individual panels, in which individual panels are impregnated with plant-based polyphenol and then treated with metal salts.

[0017] From CN 1 10 561 570 A a process for producing an artificial bamboo panel is known, in which the bamboo panel is impregnated with plant-based polyphenol and then treated with metal salts to produce, among other things, a colour effect. PRESENTATION OF THE INVENTION

[0018] The object of the present invention is to provide a method for dyeing already braided cane braiding, in which the cane braiding can be dyed evenly and opaquely, even where individual strands of the cane braiding overlap one another.

[0019] This object is achieved by a method having the features of claim 1.

[0020] In a method for dyeing cane weaving, in particular rattan or wicker cane weaving, with natural dyes or color-active reagents, wherein the cane weaving is formed by a plurality of flat strands obtained from the outer skin of a plant shoot and interwoven with one another, the smooth outer skin surface of which is directed to one side and thus an upper smooth surface and a lower rough surface of the cane weaving are formed, the following steps are provided according to the invention: a) Immersing the cane braid in a first immersion bath consisting of an aqueous solution of a natural tanning agent and bathing the cane braid in this aqueous tanning agent solution for a first predetermined period of time; b) Removing the cane braid from the first immersion bath and preferably allowing the remaining aqueous tanning agent solution to drain off; c) Applying a natural dye or color-active reagents to the cane braid for a second predetermined period of time.

[0021] Dyes are chemical compounds that have the ability to color other materials. Natural dyes are dyes of natural origin, such as plant, animal, or mineral, that themselves exhibit a coloring effect, even if this effect changes during the process. Color-active reagents are substances that chemically react with other substances during the process, such as substances contained in the aqueous solution of a natural tanning agent, and thereby produce a coloring effect, for example, by becoming or generating a dye.

[0022] Draining serves to prevent any liquid not bound in the cane mesh from being carried over into the next process step. The draining time can be short or long, or draining can be omitted entirely without this having a significant impact on the dyeing process. ADVANTAGES

[0023] In step a), the reed mesh absorbs the acidic, aqueous tanning solution, which quickly penetrates the rough, open-pored underside of each strand of the reed mesh and rises from the inside to the outer skin layer with the smooth surface through capillary action. The strand swells slightly, expanding its pores and internal capillary channels, allowing the natural dyes or color-active reagents to easily penetrate the strand and distribute themselves evenly in step c). Capillary action and osmotic effects ensure that the dyes or color-active reagents penetrate deep into the plant structure of each strand of the reed mesh from the rough underside, spread out, and rise to the smooth surface layer, even where the strands of the reed mesh overlap.In addition, chemical reactions between the dyes or the color-active reagents and the tannic acid in the aqueous tannin solution, which is already contained in the plant structure, can occur, causing a change in color or even the formation of dye.

[0024] Further preferred and advantageous features of the method according to the invention are the subject of subclaims 2 to 21.

[0025] Preferably, the application of a natural dye or color-active reagents to the cane braid in step c) is carried out by immersing the cane braid in a second immersion bath consisting of an aqueous solution of a natural dye or color-active reagents and bathing the cane braid in this aqueous dyeing solution for the second predetermined period of time, followed by the following steps; d) Removing the reed mesh from the second immersion bath and preferably allowing any remaining aqueous dye solution to drain off; e) Drying the reed mesh.

[0026] Here, too, the draining step can be shorter or longer, or even omitted entirely. In drying step e), the water content of the aqueous solutions absorbed by the respective strand evaporates, leaving the dyes stable in the plant structure.

[0027] The aqueous tanning solution preferably contains tannic acid as a natural tanning agent. The aqueous tanning solution preferably consists of tannin powder dissolved in tap water, according to a particularly preferred variant in a ratio of 25g to 50g of tannin powder per liter of water.

[0028] The tanning solution is prepared in steps prior to step a). The dyeing solution is prepared in steps prior to step c).

[0029] In a first advantageous embodiment of the method, the dyeing solution contains iron or an iron compound.

[0030] It is advantageous if the iron-containing dye solution is produced by dissolving iron filings or steel wool in an acid, preferably acetic acid, and then diluting it with water. To prepare this dye solution, according to a preferred embodiment of the process, commercially available steel wool is dissolved in 25% acetic acid, with a ratio of 3g to 6g of steel wool per 100 ml of 25% acetic acid proving advantageous. Once the steel wool has been dissolved in the vinegar, the resulting concentrate of an iron-containing dye solution is preferably poured with 10 times the amount of water.

[0031] Alternatively, the iron-containing dyeing solution can advantageously be produced by dissolving iron(II) sulfate in water, wherein such an iron-containing dyeing solution is formed according to a preferred variant by dissolving 2 g of iron(II) sulfate in one liter of water.

[0032] According to a second advantageous embodiment of the method, the dyeing solution comprises at least one dye obtained from plants or plant components.

[0033] It is advantageous if the dyeing solution contains at least one natural dye obtained from the following plants or plant components: logwood, yellowwood, madder root, turmeric, walnut shells, birch leaves, mallow blossoms.

[0034] It is advantageous if, in a step preceding process step c), the natural dye is obtained by eluting with water from a natural dye carrier consisting of or formed from at least one plant or plant constituent.

[0035] The tannin-soaked dyed material is then placed in the second immersion bath. Heat is not absolutely necessary. Here, too, the dyed material remains in the immersion bath for 4-7 days. It should also be noted that plant pigments are difficult to control, as the dye may be more or less intense depending on the harvest.

[0036] Preferably, the step of eluting the dye is carried out at a water temperature in the range between 60 °C and 90 °C, preferably in the range between 70 °C and 80 °C, particularly preferably at temperatures around 70°C.

[0037] In a first handling variant of the method according to the invention, which can be combined with other embodiments, the tubular braid is immersed in the immersion bath or baths in the form of a loosely wound coil.

[0038] In an alternative second handling variant, which can also be combined with other embodiments, the tubular mesh is immersed in the immersion bath or baths in the form of mats.

[0039] Finally, in an alternative third handling variant, which can also be combined with other embodiments, the tubular mesh can be passed through the immersion baths in a transfer movement.

[0040] When immersing the reed mesh in the first immersion bath, it is preferably provided that the first predetermined period of time lasts at least until the reed mesh has absorbed the solution of a natural tanning agent and sinks to the bottom of the first immersion bath.

[0041] Advantageously, the first predetermined period is between one day and two weeks, preferably between two days and eight days, more preferably between four and seven days.

[0042] According to a particularly preferred embodiment of the method, which can be combined with other embodiments, it is provided that the method step a) of bathing in the aqueous tanning agent solution in the first immersion bath is carried out at room temperature or below, wherein the aqueous tanning agent solution has a temperature between 0 °C and 30 °C, preferably between 5 °C and 20 °C, more preferably between 10 °C and 15 °C.

[0043] It is also particularly advantageous if the second specified period is between 12 hours and 24 hours, preferably between 15 hours and 20 hours.

[0044] Finally, according to a further preferred process variant, process step c) of dyeing is carried out at room temperature or a higher temperature, wherein the dyeing solution has a temperature between 10 °C and 90 °C, preferably between 15 °C and 60 °C, more preferably between 20 °C and 30 °C.

[0045] According to an alternative variant of the process according to the invention, the cane mesh is impregnated with a natural dye or color-active reagents in step c) by exposing the cane mesh impregnated with tannin in step a) to ammonia vapors in a closed chamber for a third predetermined period of time. These vapors, together with the tannin, form brown salts in the cane mesh.

[0046] A particularly preferred variant of the method according to the invention is one in which the first immersion bath is moved at least temporarily while step a) is being carried out. This movement can be continuous or discontinuous. The associated immersion bath vessel is preferably formed by a drum with a substantially horizontal drum axis, wherein the drum is moved about the drum axis. Preference is given to a discontinuous movement in which the drum rotates further by a predetermined angle with each rotational movement step, before then remaining in the new position until the next rotational movement step occurs. The step-by-step rotational movement is very slow, for example, it amounts to a cumulative rate of between 0.5 and 2 revolutions per minute, preferably 1 revolution per minute.The agitation of the immersion bath achieved in this way prevents the immersion bath from separating, so that a uniform saturation of all the tube braids of an inserted tube braid stack or an inserted tube braid roll (not shown) with essentially homogeneous liquid of the immersion bath is achieved.

[0047] If the tubular braid is exposed to the natural dye or to color-active reagents according to claim 2 in a second immersion bath, the second immersion bath can preferably also be moved at least temporarily while step c) is carried out. This movement can also be continuous or discontinuous. The associated immersion bath vessel is preferably also formed by a drum with a substantially horizontal drum axis, wherein the drum is moved about the drum axis. Here, too, a discontinuous movement is preferred, in which the drum rotates further by a predetermined angle with each rotational movement step, before then remaining in the new position until the next rotational movement step occurs. Here, too, the step-by-step rotational movement is very slow and cumulatively amounts to, for example, between 0.5 and 2 revolutions per minute, preferably 1 revolution per minute.

[0048] Particularly preferred is a further development of the method of the invention, which can be combined with other embodiments, in which the tubular mesh, after the dyeing process according to claim 1 or claim 2, is exposed to irradiation with ultraviolet light from at least one UV light source for a fourth predetermined period of time. During this irradiation with UV light, the non-lightfast color components of the dye obtained in the dyeing process are degraded, leaving only the lightfast color components remaining in the tubular mesh.

[0049] The invention is also directed to the use of a dyeing process, in particular a dyeing process according to the invention mentioned above, for braided cane braiding with the steps Immersing the woven cane in a first immersion bath containing an aqueous solution of a natural tanning agent and bathing the woven cane in this aqueous tanning agent solution for a first predetermined period of time; removing the dyed material from the first immersion bath and preferably allowing the still adhering aqueous tanning agent solution to drain off; immersing the woven cane in a second immersion bath containing an aqueous dyeing solution of a natural dye or color-active reagents and bathing the woven cane in the dyeing solution for a second predetermined period of time; removing the woven cane from the second immersion bath and preferably allowing the still adhering aqueous dyeing solution to drain off; drying the woven cane, for dyeing already woven cane weave, in particular rattan or wicker cane weave, wherein the cane weave is formed by a plurality of interwoven strands obtained from the outer skin of a plant shoot. flat strands whose smooth outer skin surface is directed to one side, thus forming an upper smooth surface and a lower rough surface of the cane braid.

[0050] Alternatively, the invention also relates to the use of a dyeing process for braided cane mesh comprising the steps Immersing the cane weave in a first immersion bath of an aqueous solution of a natural tanning agent and bathing the cane weave in this aqueous tanning agent solution for a first predetermined period of time; removing the dyed material from the first immersion bath and preferably allowing the remaining aqueous tanning agent solution to drip off; exposing the tannin-soaked cane weave to ammonia vapors in a closed chamber, for dyeing already woven cane weave, in particular rattan or wicker cane weave, wherein the cane weave is formed by a plurality of flat strands obtained from the outer skin of a plant shoot and interwoven with one another, the smooth outer skin surface of which is directed to one side and thus an upper smooth surface and a lower rough surface of the cane weave are formed.

[0051] Finally, the invention is also directed to a cane weave, in particular rattan or wicker cane weave, which is formed by a plurality of flat strands obtained from the outer skin of a plant shoot and interwoven with one another, the smooth outer skin surface of which is directed to one side, thus forming an upper smooth surface and a lower rough surface of the cane weave, in particular cane weave which has been treated as a finished cane weave by a method according to the invention, wherein externally introduced dyes are present in the plant structure of the cane weave in a substantially uniform distribution up to the smooth outer skin surface. Such externally introduced dyes also include dyes which have only been formed in the plant structure by color-active substances introduced externally into the plant structure.

[0052] It is advantageous if the dyes or color-active substances are evenly distributed in those areas of the cane weave where individual strands of the cane weave overlap each other.

[0053] The core of the invention thus relates to a two-stage dyeing process in which the dyed material, i.e., the cane weave, is first soaked in an aqueous solution of a natural tanning agent, i.e., a natural tannic acid solution. The tanning agents penetrate deeply into the swollen cane weave and attach themselves to the dyed material at the molecular level.

[0054] In a further step, the swollen reed is placed in a dye bath, an aqueous solution of a natural dye or color-active reagents, or it is exposed to a gas or vapor and left there. The dyes and / or color-active reagents penetrate the plant structure of the swollen fiber strands. If the aqueous dye solution, gas, or vapor contains dyes, they are embedded in the plant structure and fixed there by the tannins. If the aqueous dye solution, gas, or vapor contains color-active reagents, these react with the embedded tannins to produce a dye.

[0055] Experiments by the inventors have led to the following results: tannin Dye carrier color-active reagent resulting color Tannin Logwood beige-brown Tannin Yellowwood yellowish-green Tannin madder root light brown-orange Tannin turmeric light yellow tannin Dye carrier color-active reagent resulting color Tannin Walnut shells light gray-green Tannin Birch leaves light grey-yellow Tannin Mallow flowers gray-green Tannin iron brown-black

[0056] Instead of tannin, potassium alum can also be used as a tanning agent.

[0057] Preferred embodiments of the invention with additional design details and further advantages are described and explained in more detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] It shows: Fig. 1 shows a section of a flat tube mesh and Fig. 2 shows a simplified flow diagram of a method according to the invention. PRESENTATION OF PREFERRED EMBODIMENTS

[0059] Fig. 1shows a section of a cane weave 1 using the example of a so-called Viennese weave. Individual flat strands 10, 12, 14, 16, also referred to as rattan cane strands, each obtained from the outer skin of a plant shoot, for example, of the rattan palm, are woven together to form a rattan cane weave. Horizontal strands 10, vertical strands 12, first diagonal strands 14 running at a first 45° incline thereto, and second diagonal strands 16 running at a second 45° incline form the weave. At a plurality of overlapping areas, the strands lie above and below one another, such as the horizontal strand 10', which at the overlapping area 11 lies below the vertical strand 12' and below the strand 14' running diagonally in a first direction, but crosses the strand 16 running diagonally in a second direction.The weaving of a Viennese wickerwork is well known and will therefore not be described further here. The invention is not limited to the Viennese wickerwork shown, but can be implemented with any weave made of plant strands.

[0060] Fig. 2 shows a simplified schematic representation of the process of the invention. First, in step a), a stack 13 of finished braided reed braids 1 is immersed in a first immersion bath T1 containing an aqueous solution of a natural tanning agent and is immersed in this first immersion bath T1 for a first predetermined period of time t1. This preferably lasts until the reed braid has absorbed the aqueous solution of the natural tanning agent and sinks to the bottom of the first immersion bath vessel 2.

[0061] The first immersion bath vessel 2 is designed, for example, as a drum that—driven by a drive motor (not shown), preferably a stepper motor—rotates stepwise about a substantially horizontal drum axis A, with the drum remaining in its respective angular position between the individual rotation steps. The second immersion bath vessel 3 can also be designed, as described above, as a drum rotatable about a substantially horizontal axis of rotation.

[0062] After the first predetermined period of time t 1 has elapsed, the stack 13 of finished braided tubular braids 1 is removed from the first immersion bath vessel 2 and the liquid of the first immersion bath T1 adhering to the tubular braids 1 can drip off in step b).

[0063] Subsequently, the stack 13 of finished braided tube braids 1 is immersed in step c) in a second immersion bath T2 consisting of an aqueous solution of a natural

[0064] dye or color-active reagents and bathed in this second immersion bath T2 for a second predetermined period of time t2. This preferably also lasts until the tubing is saturated with the aqueous solution of the natural dye or the color-active reagents and sinks to the bottom of the second immersion bath vessel 3.

[0065] After the second predetermined period of time t 2 has elapsed, the stack 13 of finished braided tubular braids 1 is removed from the second immersion bath vessel 3 and the liquid of the second immersion bath T2 adhering to the tubular braids 1 can drip off in step d).

[0066] The stack 13 of the finished braided cane braids 1 is then dried in step e).

[0067] Alternatively, instead of the second immersion bath T2, a closed container (not shown) can be provided, into which the tubular mesh removed from the first immersion bath T1 is placed, preferably after most of the remaining liquid residues have drained off, and where it is exposed to ammonia vapors for a predetermined third period of time t3.

[0068] After the described dyeing process of the canework according to claim 1 or claim 2, the - preferably dried - canework is exposed in a step f) to irradiation with ultraviolet light by a UV light source 4 for a fourth predetermined period of time t 4 . This step f) can also be carried out at a later time, for example, when the dyed canework has already been processed and integrated into a piece of seating furniture.

[0069] Reference symbols in the claims, the description and the drawings serve only to improve the understanding of the invention and are not intended to limit the scope of protection. List of reference symbols

[0070] They refer to: 1Tube braid 2First immersion tank 3Second immersion tank 4UV light source 10Flat horizontal strand 10'Flat horizontal strand 11Overlap area 12Flat vertical strand 12'Flat vertical strand 13Stack of finished braided tube braid 14Flat first slanted strand 14'Flat first slanted strand 16Flat second slanted strand ARotation axis T1first immersion bath T2second immersion bath t 1 first specified period t 2 second specified period t 3 third specified period t 4 fourth specified period

Claims

1. A method for dyeing cane braiding with natural dyes or color-active reagents, wherein the cane braiding is formed by a plurality of flat strands obtained from the outer skin of a plant shoot and interwoven with one another, the smooth outer skin surface of which is directed to one side and thus an upper smooth surface and a lower rough surface of the cane braiding are formed, comprising the steps of: a) immersing the cane braiding in a first immersion bath consisting of an aqueous solution of a natural tanning agent and bathing the cane braiding in this aqueous tanning agent solution for a first predetermined period of time; b) removing the cane braiding from the first immersion bath; c) exposing the cane braiding to a natural dye or to color-active reagents for a second predetermined period of time.

2. Method according to claim 1, characterized by thatthe treatment of the tubular mesh with a natural dye or with color-active reagents in step c) is carried out by immersing the tubular mesh in a second immersion bath consisting of an aqueous solution of a natural dye or color-active reagents and bathing the tubular mesh in this aqueous dyeing solution for the second predetermined period of time, and that the following steps then follow: d) removing the tubular mesh from the second immersion bath and preferably allowing the still adhering aqueous dyeing solution to drip off; e) drying the tubular mesh.

3. Method according to one of the preceding claims, characterized by that the tubular braid is immersed in the immersion bath or baths in the form of a loosely rolled coil.

4. Method according to claim 1 or 2, characterized by that the reed mesh is immersed in the dipping bath or baths in the form of mats.

5. Method according to one of the preceding claims, characterized by that the first specified period of time lasts at least until the reed mesh has absorbed the solution of a natural tanning agent and sinks to the bottom of the first immersion bath.

6. Method according to one of the preceding claims, characterized by that the first predetermined period is between one day and two weeks, preferably between two days and eight days, more preferably between four and seven days.

7. Method according to one of the preceding claims, characterized by that the process step a) of bathing in the aqueous tanning solution in the first immersion bath is carried out at room temperature or below, wherein the aqueous tanning solution has a temperature between 0 °C and 30 °C, preferably between 5 °C and 20 °C, more preferably between 10 °C and 15 °C.

8. Method according to one of the preceding claims, characterized by that the second specified period is between 12 hours and 24 hours, preferably between 15 hours and 20 hours.

9. Method according to one of the preceding claims, characterized by that the process step c) of dyeing is carried out at room temperature or a higher temperature, wherein the dyeing solution has a temperature between 10 °C and 90 °C, preferably between 15 °C and 60 °C, more preferably between 20 °C and 30 °C.

10. Method according to claim 1, characterized by that the impregnation of the cane mesh with a natural dye or with color-active reagents in step c) is carried out by exposing the cane mesh impregnated with tannin in step a) to ammonia vapors in a closed chamber for a third predetermined period of time (t3).

11. Method according to one of the preceding claims, characterized by that the first immersion bath (T1) is moved at least temporarily during the execution of step a).

12. Method according to one of claims 2 to 11, characterized by that the second immersion bath (T2) is moved at least temporarily during the execution of step c).

13. Method according to one of the preceding claims, characterized by that after the dyeing process according to claim 1 or claim 2, in a step f) the tubular braid is exposed to irradiation with ultraviolet light by at least one UV light source (4) for a fourth predetermined period of time (t4).

14. Use of a dyeing process for braided cane netting comprising the steps of: - immersing the cane netting in a first dip bath containing an aqueous solution of a natural tanning agent and bathing the cane netting in this aqueous tanning agent solution for a first predetermined period of time; - removing the dyed material from the first dip bath; - immersing the cane netting in a second dip bath containing an aqueous dye solution of a natural colorant or color-active reagent and bathing the cane netting in the dye solution for a second predetermined period of time; - removing the cane netting from the second dip bath;- drying the cane weave, for dyeing already woven cane weave, in particular rattan or wicker cane weave, wherein the cane weave is formed by a plurality of flat strands obtained from the outer skin of a plant shoot and interwoven with one another, the smooth outer skin surface of which is directed to one side and thus an upper smooth surface and a lower rough surface of the cane weave are formed; 15. Use of a dyeing process for braided reeds, comprising the steps of: - immersing the reeds in a first dipping bath of an aqueous solution of a natural tanning agent and bathing the reeds in this aqueous tanning agent solution for a first predetermined period of time; - removing the dyed material from the first dipping bath; - exposing the tannin-soaked reeds in a closed chamber to ammonia vapors, for dyeing already braided reeds, wherein the reeds are formed by a plurality of flat strands obtained from the outer skin of a plant shoot and interwoven, the smooth outer skin surface of which is directed to one side, thus forming an upper smooth surface and a lower rough surface of the reeds.

16. Cane weaving (1), in particular rattan or wicker cane weaving, which is formed by a plurality of flat strands (10, 12, 14, 16) obtained from the outer skin of a plant shoot and interwoven with one another, the smooth outer skin surface of which is directed to one side and thus an upper smooth surface and a lower rough surface of the cane weaving (1) are formed, in particular cane weaving (1) which has been treated as a finished cane weaving (1) according to a method of claims 1 to 21, characterized by that in the plant structure of the cane weave (1) externally introduced dyes are essentially evenly distributed up to the smooth outer skin surface.

17. Tubular mesh according to claim 16, characterized by thatthe uniform distribution of the dyes or color-active substances is also present in those areas (11) of the cane braid (1) in which individual strands (10', 12', 14') of the cane braid (1) overlap one another.

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