Hair thickening method, hair coloring method and hair for thickening

Abstract

This method makes the knots and other fixing points of hair extensions, which are attached to natural hair, less noticeable when they become loose over time due to use. [Solution] A hair extension method including a coloring step of coloring a portion of hair extensions fixed to the natural hair, wherein the hair extensions have a fixing portion that is fixed to the natural hair and a hair portion connected to the fixing portion and having the appearance of hair, the fixing portion is a lighter color than the hair portion before the coloring step is performed, and the coloring step is characterized in that the fixing portion is colored while the hair extensions are fixed to the natural hair.

Description

[Technical Field]

[0001] This invention relates to a method for increasing hair volume, a method for coloring hair for increasing hair volume, and hair for increasing hair volume. [Background technology]

[0002] A known method of hair extension involves attaching hair extensions to one's natural hair. One way to attach the extensions is to tie them to the natural hair. However, since extensions are generally colored in dark colors such as black, the knots may appear as black dots, resulting in an unnatural appearance.

[0003] In contrast, Patent Document 1 discloses hair extensions that have a skin-colored or light-colored area in the part that forms the knot. According to Patent Document 1, it is possible to provide hair extensions where the knot between the hair extension and the natural hair looks natural and does not feel unnatural. [Prior art documents] [Patent Documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2003-41417 [Overview of the project] [Problems that the invention aims to solve]

[0005] However, with conventional techniques, when the natural hair grows and the knot moves away from the scalp and becomes raised, the knot can become even more noticeable when combined with the natural hair or the hair extensions themselves.

[0006] Therefore, the present invention aims to provide a hair extension method, a hair extension coloring method, and hair extension hair that can make the fixing parts of the hair extension hair less noticeable when the fixing parts, such as knots, of the hair extension hair become loose due to use over time. [Means for solving the problem]

[0007] To achieve the above objective, the present invention provides a hair extension method that includes a coloring step of coloring a portion of hair extension material fixed to the natural hair, wherein the hair extension material has a fixing portion that is fixed to the natural hair and a hair portion connected to the fixing portion and having the appearance of hair, the fixing portion is lighter in color than the hair portion before the coloring step is performed, and the coloring step is characterized in that the fixing portion is colored while the hair extension material is fixed to the natural hair.

[0008] Furthermore, the present invention relates to a method for coloring hair for hair extensions, which includes a coloring step of coloring a portion of the hair extensions fixed to the natural hair, wherein the hair extensions have a fixing portion that is fixed to the natural hair and a hair portion connected to the fixing portion and having the appearance of hair, the fixing portion is a lighter color than the hair portion before the coloring step is performed, and the coloring step is characterized in that the fixing portion is colored while the hair extensions are fixed to the natural hair.

[0009] Furthermore, the hair extension material of the present invention has a fixing portion for fixing to natural hair and a hair portion connected to the fixing portion and having the appearance of hair, and is a hair extension material used by fixing to natural hair, wherein the fixing portion is a lighter color than the hair portion, and the hair extension material can be colored while it is fixed to natural hair. [Effects of the Invention]

[0010] According to the present invention, when the fixing parts of hair extensions, such as knots, become loose due to use over time, the fixing parts of the hair extensions can be made less noticeable. [Brief explanation of the drawing]

[0011] [Figure 1] These are schematic diagrams (A) to (C) illustrating an example of hair extension material and an example of how to attach hair extension material to natural hair. [Figure 2]Schematic diagrams (A) and (B) for explaining an example of hair for hair growth enhancement. [Figure 3] Schematic diagrams (A) and (B) for explaining an example of a method for fixing hair for hair growth enhancement. [Figure 4] Schematic diagrams (A) to (D) for explaining another example of a method for fixing hair for hair growth enhancement. [Figure 5] Schematic diagrams for explaining the state where the fixing part (knot) of the hair for hair growth enhancement has risen, which are diagram (A) before the coloring process and diagram (B) after the coloring process. [Figure 6] Photographs showing the state where the fixing part (knot) of the hair for hair growth enhancement has risen, which are photograph (A) before the coloring process and photograph (B) after the coloring process. [Figure 7] Schematic diagram (A) and its enlarged view (B) for explaining an example of a coloring device. [Figure 8] Schematic diagrams (A) and (B) for explaining an example of a coloring process using a coloring device. [Figure 9] Schematic diagrams (A) and (B) and an enlarged view (C) of (B) for explaining an example of a protective member. [Figure 10] Schematic diagrams (A) and (B) for explaining an example of the production of a transfer sheet. [Figure 11] Schematic diagrams (A) to (C) for explaining an example of the production of hair for hair growth enhancement. [Figure 12] Schematic diagram for explaining an example of the coloring state, which are diagram (A) before the coloring process, and diagrams (B) and (C) after the coloring process. [Figure 13] Schematic diagrams (A) and (B) for explaining another example of a fixing part. [Figure 14] Schematic diagrams (A) to (C) for explaining another example of a method for fixing hair for hair growth enhancement.

Embodiments for Carrying Out the Invention

[0012] The hair thickening method, hair coloring method, and hair thickening hair according to the present invention will be described below with reference to the drawings. It should be noted that the present invention is not limited to the embodiments shown below, and other embodiments, additions, modifications, and deletions may be made within the scope of what a person skilled in the art can conceive. Any embodiment that achieves the function and effect of the present invention is included within the scope of the present invention.

[0013] The present invention relates to a hair extension method that includes a coloring step of coloring a portion of hair extension material fixed to the natural hair, wherein the hair extension material has a fixing portion that is fixed to the natural hair and a hair portion connected to the fixing portion and having the appearance of hair, the fixing portion is lighter in color than the hair portion before the coloring step is performed, and the coloring step is characterized in that the fixing portion is colored while the hair extension material is fixed to the natural hair.

[0014] The present invention relates to a method for coloring hair extensions, comprising a coloring step of coloring a portion of the hair extensions fixed to the natural hair, wherein the hair extensions have a fixing portion for fixing to the natural hair and a hair portion connected to the fixing portion and having the appearance of hair, the fixing portion is a lighter color than the hair portion before the coloring step is performed, and the coloring step is characterized in that the fixing portion is colored while the hair extensions are fixed to the natural hair.

[0015] The hair extension material of the present invention comprises a fixing portion for fixing to natural hair and a hair portion connected to the fixing portion and having the appearance of hair, and is used by fixing it to natural hair, wherein the fixing portion is a lighter color than the hair portion, and the hair extension material can be colored while it is fixed to natural hair.

[0016] According to the present invention, when the fixing parts of hair extensions, such as knots, become loose due to use over time, the fixing parts of the hair extensions can be made less noticeable.

[0017] Hair extensions 10 can be made using, for example, artificial hair as a material. Examples of artificial hair include synthetic fibers, and examples of synthetic fibers include polyester, nylon, acrylic, and vinyl chloride synthetic fibers. Although not particularly limited, it is preferable to make hair extensions using polyester synthetic fibers.

[0018] Figure 1 is a schematic diagram illustrating an example of hair extension material and an example of how the hair extension material is attached to natural hair. For example, as shown in (A), the hair extension material 10 in this example has a fixing part 12 for fixing to natural hair and a hair part 14 connected to the fixing part 12.

[0019] As shown by the dashed arrow in (A), the annular fixing part 12 is passed through the natural hair 20. (B) is a diagram showing the state after the fixing part 12 has been passed through the natural hair 20. (C) is a diagram showing the state after the annular fixing part 12 has been narrowed and the hair extension hair 10 has been fixed to the natural hair 20. In this way, the hair extension hair 10 can be used on the user's head.

[0020] One or more hair portions 14 are provided in the hair extension hair 10. When the hair extension hair 10 is used on natural hair 20, the hair portion 14 has the appearance of hair. The hair portion 14 is connected to the fixing portion 12. Connecting means that the hair portion 14 and the fixing portion 12 are connected. There may be a boundary between the hair portion 14 and the fixing portion 12, and they may be separable, or there may be no boundary between the hair portion 14 and the fixing portion 12, and they may be integrated. If there is no boundary between the hair portion 14 and the fixing portion 12, for example, the part that contributes to fixing the hair extension hair may be considered as the fixing portion 12. From the viewpoint of obtaining the effects of the present invention, it is not necessary to strictly specify the boundary between the hair portion 14 and the fixing portion 12.

[0021] The fixing part 12 is the part for fixing the hair extension hair 10 to the natural hair 20. The fixing part 12 is not particularly limited and includes multiple forms. Fixing includes tying, joining, attaching, tying, and setting. When hair extension hair 10 is used, if the hair part 14 looks like real hair and the hair extension hair 10 does not easily come off the natural hair 20, then the hair extension hair 10 can be said to be fixed to the natural hair 20.

[0022] As shown in the example in Figure 1, the fixing portion 12 may also be an annular portion, and by inserting the natural hair 20 through the annular portion and narrowing the annular portion, the hair extension hair 10 can be fixed to the natural hair 20. The fixing portion 12 when the hair extension hair 10 is fixed to the natural hair 20 may be called a knot or the like.

[0023] The statement that hair extensions are fixed to natural hair is not particularly limited and includes multiple forms. For example, one method is to tie the hair extensions to natural hair. The method of tying is not particularly limited and can be selected as appropriate. A loop may be created in the hair extensions, the natural hair may be passed through the loop, and then the loop may be narrowed to secure it. Other methods of tying include a square knot or a bow knot.

[0024] In addition to the above, other methods can be appropriately selected for fixing the hair extensions 10. For example, in Figure 1(B), after passing the natural hair 20 through the ring, the natural hair 20 may be tied to the ring while narrowing the ring. In this case, the hair extensions 10 will be less likely to come off. The same method may be used in Figures 3(A) and 4(C) described later. Figure 14 described later illustrates an example of tying the natural hair 20.

[0025] Figure 2 is another diagram illustrating an example of hair for hair thickening 10. The example shown in (A) is an example of creating hair extension hair 10 using one strand of artificial hair. In (A), a ring portion is formed on the artificial hair to form the fixing portion 12, and the portion other than the ring portion is the hair portion 14. In the hair extension hair 10 shown in (A), the fixing portion 12 is single, and there are two hair portions 14.

[0026] In the example shown in (A), the fixing portion 12 is shown with a dashed line to indicate that the fixing portion 12 is a lighter color than the hair portion 14 before the coloring process is performed. Because the fixing portion 12 is a lighter color than the hair portion 14, when the hair extension hair 10 is used, the fixing portion 12 will be an inconspicuous or less conspicuous color.

[0027] Examples of colors lighter than the hair portion 14 include transparent, white, and light colors, while examples of light colors include skin tone, gray, and brown, as well as other colors such as blonde. Whether the fixing portion 12 is lighter in color than the hair portion 14 can be determined by visual inspection or by measurement using a measuring device. Known measuring devices can be used, and known techniques can be used for measuring values ​​and making judgments. In addition, colors lighter than the hair portion 14 may simply be referred to as "light colors." Also, colors the same as the hair portion 14 or darker than the hair portion 14 may simply be referred to as "dark colors."

[0028] One example of a case where the fixing portion 12 is lighter in color than the hair portion 14 is when it is not colored from the beginning. "Not colored from the beginning" means that when manufacturing the hair extension hair 10, the portion that will become the fixing portion 12 is not colored, for example, in the material such as artificial hair. This state is sometimes also referred to as being uncolored. In addition to the above, another case in which the fixing part 12 is lighter in color than the hair part 14 is when, for example, when producing the hair extension hair 10, the material such as artificial hair is colored and the part that will become the fixing part 12 is bleached. In addition to the above, another case in which the fixing part 12 is lighter in color than the hair part 14 is when the fixing part 12 is colored with a lighter color than the hair part 14.

[0029] The example shown in (B) is an example in which hair extension hair 10 is made using two strands of artificial hair. In (B) as well, a ring portion is formed on the artificial hair to form the fixing portion 12, and the portion other than the ring portion is the hair portion 14. In the hair extension hair 10 shown in (B), the fixing portion 12 is doubled, and there are four hair portions 14.

[0030] In the example shown in (A), one strand of artificial hair is used to create one hair extension strand 10, which has advantages such as providing a natural appearance and reducing the burden on the natural hair. In the example shown in (B), since one hair extension strand 10 is made from two fibers, there is the advantage of good work efficiency.

[0031] In the hair extension hair 10 of the present invention, the fixing portion 12 is lighter in color than the hair portion 14 before it is fixed to the natural hair 20. This makes the fixing portion 12 less noticeable or less noticeable when the hair extension hair 10 is used and fixed to the natural hair 20, making it difficult to tell that the hair extension hair 10 is being used.

[0032] Figure 3 is a diagram illustrating an example of the use of hair extension hair 10, and is a diagram illustrating an example using the hair extension hair 10 shown in Figure 2(B).

[0033] As shown in the diagram, the natural hair 20 is passed through the annular fixing part 12 of the hair extension 10, and the hair part 14 is pulled. This operation is schematically shown by the arrow in (A). In this way, the hair extension 10 can be fixed to the natural hair 20, as shown in (B). Since the fixing part 12 is a lighter color than the hair part 14, the hair extension 10 becomes less noticeable when fixed to the natural hair 20. Therefore, it becomes difficult to tell that hair extensions 10 are being used, and a natural appearance can be achieved even when using hair extensions 10.

[0034] The position where the fixing part 12 is fixed to the natural hair 20 is not particularly restricted and can be selected as appropriate, but it is preferable to fix it to a position close to the roots of the natural hair 20. In this case, the usage period of the hair extension hair 10 can be extended. Also, before the coloring process, since the fixing part 12 is a lighter color than the hair part 14, the fixing part 12 will be less noticeable if it is fixed closer to the scalp.

[0035] Figure 4 illustrates another example of the use of the hair extension material 10. In this example, as shown in (A), the hair extension material 10 does not form an annular portion before being fixed to the natural hair 20, and the central part of each strand of artificial hair is lighter in color than the rest. In this example, this part is designated as the fixing portion 12.

[0036] As shown in (A) and (B), the fixing part 12 is wrapped around the natural hair 20, and the hair part 14 is passed through the formed annular portion. This operation is schematically shown by the arrow in the figure. Next, as shown in (C), the hair part 14 is pulled in the direction of the arrow. In this way, the hair extension hair 10 can be fixed to the natural hair 20, as shown in (D). In this example as well, since the fixing part 12 is a lighter color than the hair part 14, the hair extension hair 10 becomes less noticeable when fixed to the natural hair 20.

[0037] On the other hand, if the use of hair extensions 10 continues, the natural hair 40 may grow, causing the fixing part 12 to move away from the scalp and lift up. In this case, the fixing part 12 may become more noticeable when combined with the natural hair 20 and the hair portion 14 of the hair extensions 10.

[0038] Figure 5(A) is a schematic diagram showing the state after a predetermined period of time has elapsed since the hair extension hair 10 was fixed to the natural hair 20. This figure is also a schematic diagram to explain the state in which the fixing part (which may also be called a knot) of the hair extension hair has come loose, and it is a diagram before the coloring process is performed. The dashed arrows in the figure indicate that the natural hair 20 has grown and the position of the fixing part 12 has shifted (also referred to as coming loose).

[0039] Figure 6(A) is a photograph showing the condition after approximately one month of use, when the hair extension hair 10 has been fixed to the natural hair 20. This figure also shows a photograph of the state in which the fixing part (which may also be called a knot) of the hair extension hair has come loose, and it is a photograph taken before the coloring process. As time passes and the natural hair 20 grows, the fixing part 12 comes loose, and the fixing part 12, which is a lighter color than the hair part 14, becomes more noticeable.

[0040] Therefore, in this invention, a coloring step is performed to color a portion of the hair extension hair that is fixed to the natural hair. In this coloring step, the fixed portion of the hair extension hair is colored while it is fixed to the natural hair. By performing this coloring step, the raised fixed portion is colored to match, for example, the color of the natural hair or the color of the hair portion 14, making it less noticeable. Furthermore, in this invention, since the hair extension hair is colored while it is fixed to the natural hair, there is no need to remove or re-fix the hair extension hair, which reduces the effort involved and also reduces the burden on the user.

[0041] In addition to cases where the fixing part 12 is lifted, other cases include when the natural hair 20 grows, and when the fixing part 12 is positioned away from the scalp when the hair extension hair 10 is fixed to the natural hair 20. Such cases include, for example, when the worker fixing the hair extension hair 10 is not accustomed to the work.

[0042] Figure 5(B) is a schematic diagram showing the state after the coloring process has been performed on the state shown in Figure 5(A). Figure 6(B) is a photograph showing the state after the coloring process has been performed on the state shown in Figure 6(A). By performing the coloring process, the fixing part 12 (knot), which was noticeable in (A), becomes less noticeable as shown in (B). In addition, since the coloring process is performed while the hair for hair extensions is fixed, the effort required for coloring is reduced, and the burden on the user is reduced.

[0043] In this invention, coloring refers to applying color with a coloring agent such as a dye, and is a concept that includes dyeing. Coloring may also be called coloring or similar. Coloring may be applied to the surface of the hair extension hair to produce color, or the coloring agent may penetrate into the interior of the hair extension hair to produce color. The coloring agent may also be called a colorant or similar.

[0044] As explained above, the fixed portion 12 is lighter in color than the hair portion 14 before the coloring process. Examples of cases where the fixed portion 12 is lighter in color than the hair portion 14 include being uncolored (not colored from the beginning), being bleached, or being colored with a lighter color than the hair portion 14. Further explanation will be provided regarding this.

[0045] To leave the fixing portion 12 uncolored before the coloring process, for example, the portion that will become the fixing portion 12 in the artificial hair is shielded and then colored to produce hair for hair extension. To ensure that the fixing portion 12 is decolorized before the coloring process, for example, the artificial hair is colored and then decolorized to form the portion that will become the fixing portion. When coloring the artificial hair to create hair extensions, the parts to be colored can be selected as appropriate. The entire portion, including the fixing portion, may be colored, or only the fixing portion may be colored, or only a part of the fixing portion and the hair portion may be colored. Furthermore, while it is expected that the fixing portion will become transparent after decolorizing the artificial hair, it does not necessarily have to be transparent. It is sufficient that the fixing portion 12 is lighter in color than the hair portion 14 when the hair extensions are fixed to the natural hair. Before the coloring process is carried out, the fixing part 12 may be colored with a lighter color than the hair part 14. This coloring may be referred to as coloring during manufacturing to distinguish it from coloring during the coloring process. In coloring during manufacturing, the fixing part 12 may be colored with the color of the hair part 14 and then colored with a lighter color than the hair part 14, or the fixing part 12 may not be colored with the color of the hair part 14 and instead be colored with a lighter color than the hair part 14.

[0046] At the time of the coloring process, the fixing portion of the hair extension to be colored can be colored. The fixing portion can be colored by the coloring agent adhering to the surface of the fixing portion or by the coloring agent penetrating into the interior of the fixing portion during the coloring process. If the fixing portion is colored with a light color before the coloring process, for example, if it is coated (surface coated) with a paint such as skin color, the dye may not penetrate into the interior of the artificial hair, making it difficult to color. In this case, although there are no particular restrictions, the coloring can be achieved by appropriately selecting a coloring agent and a method of application, for example, by applying the coloring agent to the surface of the paint, etc., using a marker, etc.

[0047] In the coloring process, the method for coloring the fixed portion can be selected as appropriate. The coloring agent (which may also be called a colorant, etc.) used in the coloring process can be selected as appropriate, and dyes and pigments can be used. Examples of dyes include acid dyes, basic dyes, mordant dyes, acid mordant dyes, direct dyes, disperse dyes, sulfur dyes, vat dyes, azoic dyes, oxidation dyes, reactive dyes, oil-soluble dyes, and food colorings. Examples of dyes include azo dyes, anthraquinone dyes, phthalocyanine dyes, indigoid dyes, azoic dyes, diphenylmethane dyes, triphenylmethane dyes, xanthene dyes, acridine dyes, sulfur dyes, phthalein dyes, and oxidation dyes. Inorganic pigments and organic pigments can be used as pigments.

[0048] There are no particular restrictions on the colors used in the coloring process; they can be selected as appropriate. Examples include black and brown. However, the color used in the coloring process is not limited to these; any color that makes the raised fixed portion inconspicuous is acceptable, and should be selected considering the natural hair color or the color of the hair itself. For example, colored hair dye may also be used.

[0049] The method for coloring the fixed part during the coloring process can be appropriately selected. For example, methods include applying a coloring agent to the fixed part, heating a component containing a coloring agent to apply the coloring agent to the fixed part, and applying the coloring agent to the fixed part and then heating the fixed part.

[0050] Methods for applying a coloring agent to the fixed part include, for example, applying it with a pen or brush containing a coloring agent such as a dye. The pen used may be a commercially available product or one that can be made. In addition, methods for applying a cream or the like containing a coloring agent such as a dye to the fixed part include applying the coloring agent to the fixed part without heating. Furthermore, applying the coloring agent to the fixed part as used herein includes applying the coloring agent to the fixed part, allowing the coloring agent to penetrate the fixed part, adhering the coloring agent to the fixed part, and bringing the coloring agent into contact with the fixed part.

[0051] One method for applying a coloring agent to a fixed part by heating a component containing a coloring agent is to use a transfer material, as described later. For example, the fixed part can be colored by bringing a transfer material containing a coloring agent into contact with the fixed part and heating the transfer material. In this case, it is preferable to use a disperse dye that can be sublimated by heating.

[0052] One method for heating the fixed part after applying a coloring agent is to perform the above-mentioned method of applying a coloring agent to the fixed part and then heat the fixed part. For example, the coloring agent, such as a sublimation transfer dye, is applied to the fixed part using a pen containing a coloring agent, and then the fixed part is heated. Heating makes it easier for the coloring agent, such as a dye, to adhere to the fixed part, improving its fastness.

[0053] In the coloring process, it is preferable to use a method that provides a certain degree of colorfastness after coloring. In this case, the color will be less likely to fade when the hair extensions are used continuously. One example of a method that provides a certain degree of colorfastness is to apply a coloring agent and then heat it to fix the coloring agent to the fixing part.

[0054] The area to be colored during the coloring process only needs to be the fixed portion; however, it is also acceptable to color part or all of the hair portion during the coloring process. Furthermore, it is also acceptable for the natural hair 20 to be colored during the coloring process.

[0055] In the coloring process, it is preferable to color the fixed portion with a disperse dye. When coloring the fixed portion with a disperse dye, it is easier to color the hair extensions 10 while they are fixed to the natural hair 20.

[0056] There are no particular restrictions on the disperse dyes used, and they can be selected as appropriate. Examples of disperse dyes include azo disperse dyes and anthraquinone disperse dyes. Other examples of disperse dyes include compounds classified as CI Disperse Black, CI Disperse Blue, CI Disperse Red, CI Disperse Orange, CI Disperse Yellow, CI Disperse Green, CI Disperse Violet, and CI Disperse Brown. When Japanese people use artificial hair, it is expected that they will use disperse dyes that produce black or brown colors, but the dyes are not limited to these colors.

[0057] The method of coloring using disperse dyes can be selected as appropriate. For example, the coloring process involves bringing a transfer material containing a disperse dye into contact with the fixed part and heating the transfer material. By heating in this way, the disperse dye contained in the transfer material sublimes and is transferred, allowing the fixed part to be colored. In this case, by performing coloring by sublimating the disperse dye through heating, the influence of the shape of the fixed part 12 can be reduced, and uneven coloring can be suppressed. Furthermore, it is possible to color the fixed part even when coloring is performed with artificial hair and natural hair overlapping.

[0058] As a transfer material, it can be selected as appropriate, but it is preferable to use a transfer sheet containing a disperse dye. The transfer sheet can be made, for example, by printing ink containing a disperse dye onto transfer paper (Figure 10, described later). By using such a transfer sheet, it can be easily attached to a heating device (for example, Figure 7, described later), making it easier to perform heating in the coloring process.

[0059] In addition to the above, another method of coloring using disperse dyes is to apply the disperse dye to the fixed part and then heat it. That is, the coloring process involves applying the disperse dye to the fixed part and then heating the fixed part. One example of a method for applying the disperse dye to the fixed part is to apply it with a pen, as illustrated above. In this case, the effort required for preparation for the coloring process can be reduced, and the coloring process can be carried out simply.

[0060] The term "application of disperse dyes" encompasses concepts such as attachment, transfer, relocation, and coating of disperse dyes. Furthermore, contact between the disperse dye and the fixed area is also included in the concept of disperse dye application.

[0061] The heating temperature can be appropriately selected depending on the type of colorant, the form of the coloring device, the heating temperature, and the type of artificial hair. For example, when using disperse dyes, a temperature at which migration of the disperse dye occurs is selected. Preferably, the heating temperature is 150°C to 190°C, and more preferably 160°C to 180°C. If the heating temperature is too high, the hair used for hair extensions may be damaged. Therefore, if the temperature is within the above range, damage to the hair used for hair extensions can be suppressed, and the quality can be improved.

[0062] The heating time can be selected as appropriate and is not particularly limited. It can be selected as appropriate depending on the type of coloring agent, the form of the coloring device, the heating temperature, the type of artificial hair, etc. For example, if the heating temperature is between 150°C and 190°C, the heating time can be between 1 second and 10 minutes, with 1 second and 1 minute being preferable. When the heating time is within the above range, it is possible to prevent the hair for hair extensions from being damaged by heating for too long, and to prevent insufficient coloring by heating for too short a time.

[0063] Additionally, you may apply pressure when heating. Applying heat while pressurizing reduces uneven heating and makes it easier to uniformly decolorize the target area. There are no particular restrictions on the pressure used when pressurizing; for example, 0.01 kg / cm². 2 More than 0.5kg / cm 2 The following are examples of methods for applying pressure. The method of applying pressure is not particularly limited; for example, a heat press such as a known hair iron can be used. In addition, a heating device, as described in Figure 7 below, may also be used.

[0064] The coloring process may be carried out using any equipment. The equipment used in the coloring process may be called a coloring device, etc. The coloring device is a device that has the function of coloring the fixed part 12. An embodiment of a coloring device will be described. The coloring process involves heating using a coloring device, which has a first gripping part and a second gripping part, with at least one of the first gripping part and the second gripping part serving as a heating part, and at least one of the first gripping part and the second gripping part being equipped with the transfer material, with the first gripping part and the second gripping part sandwiching the fixing part, and the transfer material being heated in contact with the fixing part. By clamping the fixing part during heating, heating can be performed with appropriate pressure, reducing the displacement of the fixing part during heating and enabling high-quality coloring. Furthermore, the operation is not complicated, and the coloring process can be carried out simply. When clamping the fixing part, the hair portion may also be clamped. Additionally, using a transfer material allows for more efficient coloring.

[0065] A transfer material can be attached to the coloring device using, for example, an adhesive. Alternatively, the transfer material may be attached to the coloring device using tape or the like.

[0066] Figure 7 is a diagram illustrating an example of a coloring device. (A) is a schematic diagram illustrating that the coloring device 30 has a first gripping part 31 and a second gripping part 32. (B) is a schematic diagram showing an enlarged view of the dashed line portion of (A).

[0067] The first gripping portion 31 and the second gripping portion 32 are movable relative to each other and can clamp a fixed portion. The first gripping portion 31 and the second gripping portion 32 each have heating portions 31a and 32a. The shape of the heating portions 31a and 32a is not particularly limited and can be changed as appropriate. The heating portions 31a and 32a generate heat when power is supplied, for example, from an external power source.

[0068] The first gripping section 31 and the second gripping section 32 are each equipped with a transfer sheet 40 containing a disperse dye, which is provided to cover a portion of the surface of the heating sections 31a and 32a. With this arrangement, the first gripping section 31 and the second gripping section 32 sandwich the fixing section 12, and the fixing section 12 can be heated via the transfer sheet 40.

[0069] Figure 8 is a schematic diagram illustrating an example of a coloring process using the coloring apparatus shown in Figure 7. (A) shows the state before the coloring process, where the natural hair 20 has grown out and the fixing part 12 has lifted. The coloring apparatus 30 has a first gripping part 31 and a second gripping part 32, and the first gripping part 31 and the second gripping part 32 are each equipped with a transfer sheet 40 containing a disperse dye.

[0070] (B) is a diagram illustrating an example of the coloring process. The first gripping part 31 and the second gripping part 32 sandwich the fixing part 12 via the transfer sheet 40, and the transfer sheet 40 is brought into contact with the fixing part 12 and heated. This allows the disperse dye contained in the transfer sheet 40 to be applied to the fixing part 12, thereby coloring it.

[0071] In the example shown in Figure 8, coloring can be performed at, for example, 180°C for about 5 seconds, allowing for high-quality coloring in a short time. Furthermore, the coloring apparatus shown in Figures 7 and 8 can be operated by hand, allowing for the application of appropriate pressure.

[0072] The number of fixed parts 12 to be colored in a single heating cycle is not particularly limited and can be selected as appropriate. One fixed part 12 may be colored, or multiple fixed parts 12 may be colored simultaneously.

[0073] During the coloring process, it is preferable to use a protective material to shield the scalp from heat. Using a protective material can prevent burns to the user's head.

[0074] The protective material can be selected as appropriate. It just needs to prevent heat from being transferred to the scalp; for example, commercially available insulation materials can be used. The area to be protected may be the entire head or just a part of the head. Multiple protective materials may also be used to protect parts of the head. A protective sheet can be used as the protective material. Because the protective sheet is in sheet form, it is easy to handle and easy to install and remove from the head.

[0075] In the example shown in Figure 8, the coloring process is carried out using a protective sheet 16, as shown in (A). This prevents the heat generated during heating from being transferred to the user's head.

[0076] The protective component may have attachment points on the part that comes into contact with the head. By providing attachment points, the protective component is less likely to shift, and the transfer of heat to the scalp and hair during heating can be further suppressed. The attachment points can be selected as appropriate; for example, an adhesive material may be used. Alternatively, for example, small hooks may be used, and the hair will become entangled with these hooks, making the protective component less likely to shift. Small hooks can be used, for example, those attached to one side of a hook-and-loop fastener.

[0077] Figure 9 is a schematic diagram illustrating an example of the protective member described above. (A) is a perspective view of a protective sheet 16, which is an example of a protective member. (B) is a perspective view of the protective sheet 16 from (A) viewed from a different direction, showing the part that comes into contact with the user's head. In (B), the mounting part 17 is shown, and the protective sheet 16 is installed so that the mounting part 17 comes into contact with the user's head. (C) is an enlarged schematic diagram of the mounting part 17 from (B), and the mounting part 17 is provided with multiple small hooks 17a. The hooks 17a entangle with the user's natural hair or hair 14, making it difficult for the protective sheet 16 to shift. By using such a protective sheet 16, safety is improved.

[0078] Figure 10 is a schematic diagram illustrating an example of the preparation of a transfer sheet. By printing ink onto the transfer paper 41 shown in (A), the transfer sheet 40 shown in (B) is prepared. The ink can be appropriately selected, for example, a sublimation ink containing a disperse dye is used. The printing apparatus can be appropriately selected, and a known printing apparatus can be used.

[0079] The hair thickening method of the present invention includes a coloring step, and may also include other steps. The hair extension method of the present invention may include, for example, a manufacturing step of producing hair extensions, a fixing step of fixing the hair extensions to the natural hair, and a re-fixing step of re-fixing the hair extensions.

[0080] The hair thickening method of the present invention may include a fixing step (sometimes referred to as a fixing method) in which the hair thickening material is fixed to the natural hair before the coloring step. The method of fixing the hair thickening material to the natural hair can be appropriately selected, as explained with reference to Figures 1 to 4. For example, a ring portion may be formed on the hair thickening material, or it may be tied to the natural hair. Alternatively, it may be fixed as shown in Figure 14, which will be described later. By fixing the hair thickening material to the natural hair before the coloring step, the hair thickening material can be used on the user's head, and the hair thickening effect can be obtained. Furthermore, the hair thickening material used in the present invention has a fixing part that is not easily noticeable, making it difficult to tell that hair thickening material is being used.

[0081] The re-fixing process, which involves re-securing hair extensions that have already been fixed, is performed when adjusting the position of the fixing points or when the fixation by the fixing points has loosened. The same method as the initial fixing process may be used, or a different method may be used. The re-fixing process is expected to be performed before the coloring process. In this case, it is possible to prevent the hair extensions from loosening or falling off after the coloring process. The re-fixing process may also be performed after the coloring process.

[0082] The manufacturing process for producing hair extensions can be selected as appropriate. If, for example, artificial hair is used as the material for the hair extensions, the manufacturing process may include a step of coloring the artificial hair as well as a step of forming a fixing part. As mentioned above, for example, resin fibers can be used as the artificial hair.

[0083] The coloring process described herein is different from the coloring process described in this specification. To distinguish it, the coloring process described herein will be referred to as the manufacturing coloring process. The coloring agent used in the manufacturing coloring process and the coloring agent used in the coloring process may be the same or different. It is preferable that the coloring agent is the same in both processes, in which case the appearance of the hair extension after the coloring process will be more natural. In the manufacturing coloring process, an uncolored fixed part can be formed by not coloring the part that will become the fixed part. To form an uncolored fixed part, for example, a shielding material may be used in the part that will become the fixed part. In the manufacturing coloring process, by using different coloring agents for the hair part and the fixed part, a fixed part that is colored with a lighter color than the hair part can be formed.

[0084] The manufacturing process for producing hair for hair extensions may include a bleaching step. The bleaching step is a process of bleaching the areas that will be fixed in place, and can be selected as appropriate. The decolorization process is preferably carried out as follows. In this method, the hair is colored with a disperse dye, and a decolorizing agent is applied followed by heating. This method allows for simple and efficient decolorization.

[0085] In the hair growth method of this example, the hair part is colored with a disperse dye, and the fixed part is formed by decolorizing the disperse dye. Before the fixing step, it includes a decolorizing step of decolorizing the part that will become the fixed part in the hair for hair growth. In the decolorizing step, it is preferable to apply a decolorizing agent to the part that will become the fixed part in the hair for hair growth and heat it for decolorization.

[0086] The decolorizing agent preferably contains at least one compound selected from the following general formula (1) and the following general formula (2). By using such a compound, the decolorizing effect of artificial hair is improved. R 1 OOC-X-COOR 2 ···(1) R 3 COO-(AO)n-Y 1 ···(2)

[0087] In general formula (1), X is an alkylene group or alkenylene group having 2 to 4 carbon atoms, and R 1 is an alkyl group having 1 to 4 carbon atoms, and R 2 is an alkyl group having 1 to 4 carbon atoms. The alkylene group represented by X may be linear or branched, but when it is linear, a higher decolorizing effect is more likely to be exerted. In general formula (2), AO is an alkyleneoxy group having 2 to 3 carbon atoms, n is an integer of 1 to 3, R 3 is an alkyl group having 1 to 4 carbon atoms, Y 1 is a hydrogen atom or R 4 CO group, and R 4 is an alkyl group having 1 to 4 carbon atoms. <;

[0088] The compound represented by the above general formula (1) has a chemical structure corresponding to a dibasic acid diester. Specific examples of compounds having such a chemical structure include, for example, dimethyl succinate, diethyl succinate, dimethyl glutarate, diethyl glutarate, dimethyl adipate, diethyl adipate, dimethyl 2-methylglutarate, diethyl 2-methylglutarate, dimethyl maleate, and diethyl maleate. When the compound represented by the above general formula (1) is at least one selected from dimethyl succinate, dimethyl glutarate, and dimethyl adipate, an even higher decolorizing effect is exhibited.

[0089] In the general formula (2) above, AO is an alkylene oxy group having 2 to 3 carbon atoms, and n is an integer from 1 to 3. In particular, a higher decolorizing effect is more likely to be observed when AO is an ethylene oxy group or when n is small.

[0090] In the above general formula (2), R 3 Y is an alkyl group having 1 to 4 carbon atoms. 1 is a hydrogen atom or R 4 It is a CO group, R 4 R is an alkyl group having 1 to 4 carbon atoms. In particular, 3 is an alkyl group having 1 or 2 carbon atoms, and R 4 A higher decolorizing effect is more likely to be achieved when the alkyl group has 1 or 2 carbon atoms. 3 and R 4 These may be the same group or different groups.

[0091] Specific examples of compounds represented by the above general formula (2) include, for example, ethylene glycol diacetate, di- or triethylene glycol diacetate, propylene glycol diacetate, di- or tripropylene glycol diacetate, and the like.

[0092] The decolorizing agent may consist solely of the compound represented by the above general formula (1) or the above general formula (2), or it may contain other components in addition to the compound. Examples of other components include water and other additives. When water or other additives are included, the concentration of the compound represented by the above general formula (1) or the above general formula (2) is preferably 95% by mass or more.

[0093] The method of applying the bleaching agent can be selected as appropriate. For example, the bleaching agent may be applied to the artificial hair using a processing agent application member, or the artificial hair may be immersed in the bleaching agent. Alternatively, the bleaching agent may be applied to bundles of artificial hair, to individual strands, or to a hair sheet containing multiple strands of artificial hair. Furthermore, the bleaching agent may be applied to the artificial hair in a linear or thread-like state, or annular sections may be formed on the artificial hair to create hair extensions before the bleaching agent is applied.

[0094] The decolorizing process may be performed on a single strand of artificial hair, or on multiple strands of artificial hair simultaneously. When the decolorizing agent is applied to multiple strands of artificial hair simultaneously, productivity can be improved. Furthermore, the decolorizing agent application and heating may be performed simultaneously. For example, a jig may be used to bring the decolorizing agent application component into contact with the artificial hair and then heat it. The heating temperature in the decolorizing process can be appropriately selected, as long as it is a temperature at which the disperse dye migrates. For example, a heating temperature of 150°C to 190°C is preferred, and 160°C to 180°C is more preferred.

[0095] Figure 11 is a schematic diagram illustrating an example of the production of hair for hair extensions, and is a diagram illustrating an example of the decolorization process. In this example, as shown in (A) and (B), multiple artificial hairs 18 are colored, and as shown in (C), the parts that will become the fixing part 12 are decolorized. The artificial hair after coloring is indicated by reference numeral 18a. In this example, a decolorizing agent is applied to the artificial hairs 18 using a processing agent application member, and decolorization is performed by heating. Productivity is improved by decolorizing multiple artificial hairs 18 at once. For example, a twisted paper cord is used as the processing agent application member.

[0096] An example of the coloring state of hair used for hair extensions will be explained in detail using Figure 12. Figure 12 is a schematic, enlarged view of the area around the fixing part 12 when the hair extension hair 10 is fixed to the natural hair 20.

[0097] (A) is a diagram before the coloring process. As shown in the diagram, in this example, the part that contributes to fixing the hair extension hair 10 is designated as the fixing part 12. In the present invention, as shown in the diagram, a part of the hair part 14 may be light in color. Furthermore, the present invention is not limited thereto, and a part of the fixing part 12 may be dark in color. Furthermore, the present invention is not limited thereto, and the light-colored part shown in the diagram may be included in the fixing part 12.

[0098] (B) is a diagram showing an example after the coloring process. As shown in the diagram, the hair portion 14 may be colored by the coloring process. If a part of the hair portion 14 is a light color as in (A), it is preferable to color that part by the coloring process as in (B). In this case, uneven coloring is reduced, resulting in a more natural appearance.

[0099] However, the present invention is not limited to the example shown in (B), but may also be the example shown in (C). (C) is a diagram showing another example after the coloring process. As shown, the hair portion 14 does not need to be colored by the coloring process. Even in this case, the visibility of the raised fixing portion 12 can be reduced. In addition to (B) and (C) above, even if there are parts of the fixing portion 12 that have not been colored after the coloring process, if the visibility of the raised fixing portion 12 can be prevented, the effects of the present invention can be said to have been obtained.

[0100] Figure 13 is a schematic diagram illustrating another example of the hair extension material 10. The hair extension material 10 may be provided with a fixing part 12 as shown in (A) or as shown in (B). The hair extension material 10 can be fixed to the natural hair 20 by inserting the natural hair 20 through the annular fixing part 12 and pulling the hair portion 14.

[0101] Figure 14 is a schematic diagram illustrating another example of the fixing process (fixing method) for the hair extension hair 10. This example shows a case where the natural hair 20 is passed through the ring portion, and then the natural hair 20 is tied while the ring portion is narrowed to secure it. This example also uses the example of the hair extension hair 10 shown in Figure 13(B).

[0102] As shown in (A), the natural hair 20 is passed through the annular portion of the hair extension 10. Then, as shown in (B) and (C), the natural hair 20 is wrapped around the annular portion of the hair extension 10. Next, as shown by the arrow in (C), the hair portion 14 of the hair extension 10 and the natural hair 20 are pulled and fixed together. By fixing in this manner, the hair extension 10 can be fixed more firmly, and the hair extension 10 can be made less likely to come off the natural hair 20. This fixing method is an excellent fixing method in the hair extension method of the present invention and can be said to be a preferred example of the fixing step described above. Furthermore, the method for intertwining the natural hair 20 with the hair extension hair 10, as shown in (B) and (C), can be selected as appropriate. For example, it may be done by hand or using a jig such as a crochet hook.

[0103] In the hair extension material of the present invention, the fixing portion preferably has an annular portion through which the natural hair is inserted. Having an annular portion makes it easier to attach the hair extension material to the natural hair. The annular portion can be formed by known methods, and a jig may be used.

[0104] In the hair extension hair of the present invention, it is preferable that the fixed portion is colored by applying a disperse dye and heating it while the hair extension hair is fixed to the natural hair. This means that in the coloring process described above, the fixed portion is colored by applying a disperse dye and heating it while the hair extension hair is fixed to the natural hair. When colored in this way, the fixed portion can be colored simply, efficiently, and while suppressing uneven coloring. [Explanation of Symbols]

[0105] 10 Hair for hair thickening 12 Fixed part 14 Hair 16 protective sheets 17 Installation part 17a Hook 18 Synthetic hair 19 Adhesive 20 Natural hair 30 Coloring device 31, 32 Gripping part 31a, 32a heating section 40 Transfer Sheets 41 Transfer paper 42 Ink

Claims

1. A hair extension method that includes a coloring step of coloring a portion of the hair extensions fixed to the natural hair, The aforementioned hair extension material has a fixing portion for fixing to the natural hair, and a hair portion connected to the fixing portion that has the appearance of hair. The fixed portion is lighter in color than the hair portion before the coloring process is performed. The coloring step involves coloring the fixing portion while the hair extension is fixed to the natural hair. A hair thickening method characterized by the following features.

2. The coloring step involves coloring the fixed portion with a disperse dye. The hair thickening method according to feature 1.

3. The coloring step involves bringing a transfer material containing a disperse dye into contact with the fixing part and heating the transfer material. The hair thickening method according to feature 1.

4. The coloring step involves applying a disperse dye to the fixed portion and then heating the fixed portion. The hair thickening method according to feature 1.

5. The aforementioned coloring process uses a protective material to protect the scalp from heat during heating. The hair thickening method according to feature 3 or 4.

6. The aforementioned coloring process involves heating using a coloring device. The coloring device has a first gripping section and a second gripping section, and at least one of the first gripping section and the second gripping section is a heating section. At least one of the first gripping portion and the second gripping portion is provided with the transfer material, the first gripping portion and the second gripping portion sandwich the fixing portion, and the transfer material is brought into contact with the fixing portion and heated. The hair thickening method according to feature 3.

7. Prior to the coloring step, the process includes a fixing step in which the hair extensions are fixed to the natural hair. The hair thickening method according to feature 1.

8. The aforementioned hair portion is colored with a disperse dye. The fixed portion is formed by decolorizing a disperse dye. Prior to the fixing step, a decolorization step is included in which the portion of the hair used for hair extension that will be used for fixing is decolorized. The decolorization step involves applying a decolorizing agent to the portion of the hair extension that will be used as the fixing part, and then heating it to decolorize it. The hair thickening method according to feature 7.

9. A method for coloring hair extensions, which includes a coloring step of coloring a portion of the hair extensions that are fixed to the natural hair, The aforementioned hair extension material has a fixing portion for fixing to the natural hair, and a hair portion connected to the fixing portion that has the appearance of hair. The fixed portion is lighter in color than the hair portion before the coloring process is performed. The coloring step involves coloring the fixing portion while the hair extension is fixed to the natural hair. A method for coloring hair for hair thickening, characterized by the following features.

10. A hair extension material having a fixing part for fixing to natural hair, and a hair part connected to the fixing part and having the appearance of hair, which is used by fixing to natural hair, The fixing portion is a lighter color than the hair portion, and the hair extension can be colored while it is fixed to the natural hair. Hair for hair thickening characterized by the following features.

11. The fixing portion has an annular portion through which the natural hair is inserted. Hair for hair thickening according to feature 10.

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