Semi-permanent tattoo with improved application

Abstract

In a first aspect, the present disclosure relates to a temporary tattoo ink comprising one or more semi-permanent colorants, and one or more compounds selected from the group consisting of 1, 3-butanediol, pentanediol, hexanediol, or mixtures thereof.

Description

[0001] This application claims the benefit of European Patent Application No. 23170745.6, filed on April 28, 2023, entitled “Semi-permanent tattoo with improved application”, the contents of which are incorporated herein by reference. Technical Field

[0002] This invention relates to the field of tattooing. More specifically, this invention relates to semi-permanent tattooing. Background Technology

[0003] Throughout human history, temporary or semi-permanent tattoos, or body inks, have been used to adorn the body. Typically, temporary or semi-permanent tattoos are transferred to the skin by directly exposing it to tattoo ink for a specified incubation period. The quality of the transferred image and its duration on the skin can depend on the distribution profile of the ink in the outer layer of skin, known as the stratum corneum, or in the epidermis. Current manufacturing processes for pre-designed tattoos involve the use of various forms of topical formulations, including flexographic or gravure inks, stencil printing, and inkjet printing.

[0004] For example, semi-permanent tattoos can be applied using semi-permanent pigments such as genipin and genipin derivatives. Genipin can chemically bind to the skin (in mammals, especially humans), causing the skin to appear blue for a long time.

[0005] Semi-permanent pigments can be incorporated into applicators (e.g., stickers) to facilitate the application of semi-permanent tattoos by a user. The applicator may have a predefined pattern including the semi-permanent pigment, which defines the design of the semi-permanent tattoo. To manufacture an applicator for semi-permanent tattoos, the semi-permanent pigment can be mixed with other compounds, such as solvents, to form a temporary tattoo ink. The temporary tattoo ink can be printed in the form of a predefined pattern onto an adhesive layer disposed on a carrier pad. To apply the semi-permanent tattoo, the adhesive layer can then be placed on the skin portion intended to display the semi-permanent tattoo, where the semi-permanent pigment can diffuse into the skin.

[0006] WO 2020 / 163830 A1 discloses such an applicator and a suitable ink, which, in addition to genipin as a semi-permanent colorant, also includes water, ethanol, and diethylene glycol monoethyl ether (Transcutol). ® These components are used as components in liquid inks. Inks based on these components have also been commercialized by the applicant.

[0007] However, it has been found that semi-permanent tattoos obtained by applying them with such an applicator may have a mottled and uneven appearance.

[0008] This disclosure relates to improvements in semi-permanent tattooing. Summary of the Invention

[0009] In a first aspect, this disclosure relates to a temporary tattoo ink comprising one or more semi-permanent colorants, and one or more compounds selected from the group consisting of 1,3-butanediol, pentanediol, hexanediol, or mixtures thereof.

[0010] In some embodiments of the first aspect, one or more compounds may comprise pentanediol.

[0011] In some embodiments of the first aspect, the semi-permanent colorant may contain genipin or genipin derivatives, particularly purified genipin.

[0012] In some embodiments according to the first aspect, temporary tattoo ink may contain one or more solvents, more specifically polar solvents, and particularly, the solvent may be selected from the group consisting of water, ethanol, or mixtures thereof.

[0013] In some embodiments according to the first aspect, the temporary tattoo ink may contain a surfactant, more specifically, the surfactant may be a diol, and in particular 1,2-hexanediol.

[0014] In some embodiments of the first aspect, the temporary tattoo ink may contain a matrix component, more specifically, wherein the matrix component may be a polyol, or even more specifically a disaccharide, and particularly trehalose.

[0015] In some embodiments of the first aspect, the semi-permanent colorant may be present in an amount between about 1% to about 20% by weight, more specifically between about 3% to about 15% by weight, and particularly between about 5% to about 10% by weight, relative to the total weight of the temporary tattoo ink.

[0016] In some embodiments of the first aspect, one or more compounds may be present in an amount between about 1% to about 30% by weight, more specifically between about 5% to about 25% by weight, and particularly between about 10% to about 20% by weight, relative to the total weight of the temporary tattoo ink.

[0017] In some embodiments of the first aspect, one or more solvents may be present in an amount between about 30% to about 90% by weight, more specifically between about 50% to about 85% by weight, and particularly between about 65% to about 80% by weight, relative to the total weight of the temporary tattoo ink.

[0018] In some embodiments of the first aspect, the solvent may comprise water and ethanol, more specifically, the ratio between water and ethanol may be between about 1:1 and about 1:2, more specifically between about 1:1.3 and about 1:1.8.

[0019] In some embodiments according to the first aspect, the matrix component may be present in an amount between about 0.1% by weight and about 6% by weight, more specifically between about 0.5% by weight and about 4% by weight, and particularly between about 1% by weight and about 3% by weight, relative to the total weight of the temporary tattoo ink.

[0020] In some embodiments according to the first aspect, the temporary tattoo ink may contain less than 1% by weight, more specifically less than 0.1% by weight of gelling agent relative to the total weight of the temporary tattoo ink, and in particular, contains no or substantially no gelling agent.

[0021] In a second aspect, this disclosure relates to an applicator for applying a pattern comprising a semi-permanent colorant. The applicator includes a carrier pad and an adhesive layer, and a pattern disposed on and / or therein in the adhesive layer, wherein the pattern comprises a semi-permanent colorant and one or more compounds selected from the group consisting of 1,3-butanediol, pentanediol, hexanediol, or mixtures thereof.

[0022] In some embodiments of the first aspect, the pattern may include a plurality of spots, wherein the plurality of spots may have an average maximum diameter between about 10 µm and about 500 µm, more specifically between about 50 µm and about 250 µm, and particularly between about 75 µm and about 130 µm.

[0023] In some embodiments according to the second aspect, the applicator may include a peeling liner.

[0024] In some embodiments according to the second aspect, the carrier liner has a first side and a second side, wherein the adhesive layer may be disposed on at least about 50%, more specifically at least 70%, and particularly at least 90% of the second side relative to the total surface area of ​​the second side.

[0025] In some embodiments according to the second aspect, the pattern may be provided on and / or therein less than 95%, more specifically less than 90%, and particularly less than 85% of the adhesive layer away from the total surface of the carrier liner.

[0026] In some embodiments according to the second aspect, the adhesive layer may comprise a rubber adhesive, and is substantially composed of or consisting of a rubber adhesive.

[0027] In some embodiments according to the second aspect, the adhesive layer may comprise a pressure-sensitive adhesive.

[0028] In some embodiments according to the second aspect, the adhesive layer may be water-insoluble.

[0029] In some embodiments according to the second aspect, the carrier liner may comprise a water-resistant polymer or a waterproof polymer, and is substantially composed of a water-resistant polymer or a waterproof polymer, particularly a waterproof polymer.

[0030] In some embodiments according to the second aspect, the carrier liner may be water-resistant or waterproof.

[0031] In some embodiments according to the second aspect, the carrier liner may have a thickness between about 10 µm and about 300 µm, more specifically between about 30 µm and about 150 µm, and particularly between about 40 µm and about 100 µm.

[0032] In some embodiments according to the second aspect, the adhesive layer may have a thickness between about 5 µm and about 200 µm, more specifically between about 20 µm and about 100 µm, and particularly between about 30 µm and about 80 µm.

[0033] In some embodiments according to the second aspect, the pattern containing the semi-permanent colorant may contain one or more compounds in an amount between about 0.01 wt% and about 30 wt% relative to the total weight of the pattern, more specifically between about 0.05 wt% and about 25 wt%, and particularly between about 0.1 wt% and about 20 wt%.

[0034] In some embodiments according to the second aspect, the pattern may comprise a matrix component, particularly wherein the matrix component comprises a polyol.

[0035] In some embodiments according to the second aspect, the polyol may have a molar mass of at least 100 g / mol, more specifically at least 200 g / mol, and particularly at least 300 g / mol. The matrix component may be a solid at 0°C, more preferably a solid at 20°C, even more specifically a solid at 30°C, and particularly a solid at 45°C.

[0036] In some embodiments according to the second aspect, the pattern containing the semi-permanent colorant may contain one or more solvents in an amount between about 0.01 wt% and about 90 wt% relative to the total weight of the pattern, more specifically between about 0.05 wt% and about 85 wt%, and particularly between about 0.1 wt% and about 80 wt%.

[0037] In a third aspect, this disclosure relates to an applicator obtained by applying temporary tattoo ink to an adhesive layer disposed on a carrier pad. The temporary tattoo ink comprises one or more semi-permanent colorants, and one or more compounds selected from the group consisting of 1,3-butanediol, pentanediol, hexanediol, or mixtures thereof.

[0038] In some embodiments according to the third aspect, temporary tattoo ink may contain one or more solvents, more specifically one or more polar solvents, and in particular, the solvent may be selected from the group consisting of water, ethanol, or mixtures thereof.

[0039] In some embodiments according to the third aspect, the coating composition can be applied by printing, particularly inkjet printing.

[0040] In some embodiments according to the third aspect, obtaining the applicator may additionally include heat treatment, particularly after applying temporary tattoo ink to the adhesive layer.

[0041] In some embodiments according to the third aspect, the heat treatment may be carried out at a temperature between about 45°C and about 85°C, more specifically between about 55°C and about 75°C, for a duration between about 20 minutes and about 120 minutes, particularly between about 30 minutes and about 60 minutes.

[0042] In some embodiments according to the third aspect, the applicator may additionally include, particularly after heat treatment, attaching the release liner to the adhesive layer by lamination.

[0043] In some embodiments according to the third aspect, the temporary tattoo ink may contain one or more solvents between about 30% to about 90% by weight, and / or one or more compounds between about 1% to about 30% by weight, and / or one or more semi-permanent colorants between about 1% to about 20% by weight.

[0044] In some embodiments of the third aspect, one or more compounds may comprise pentanediol.

[0045] In some embodiments according to the third aspect, the adhesive layer may comprise a rubber adhesive, consist essentially of a rubber adhesive, or be composed of a rubber adhesive.

[0046] In a fourth aspect, this disclosure relates to a method for manufacturing an applicator for applying a pattern comprising a semi-permanent colorant. The method includes applying temporary tattoo ink onto an adhesive layer disposed on a carrier pad, wherein the temporary tattoo ink comprises one or more semi-permanent colorants and one or more compounds selected from the group consisting of 1,3-butanediol, pentanediol, hexanediol, or mixtures thereof.

[0047] In some embodiments of the fourth aspect, the temporary tattoo ink may contain one or more solvents, more specifically one or more polar solvents, and in particular, the solvent may be selected from the group consisting of water, ethanol, or mixtures thereof.

[0048] In some embodiments of the fourth aspect, the coating composition can be applied by printing, particularly inkjet printing.

[0049] In some embodiments of the fourth aspect, obtaining the applicator may additionally include heat treatment, particularly after applying temporary tattoo ink.

[0050] In some embodiments of the fourth aspect, the heat treatment may be carried out at a temperature between about 45°C and about 85°C, more specifically between about 55°C and about 75°C, for a duration between about 20 minutes and about 120 minutes, particularly between about 30 minutes and about 60 minutes.

[0051] In some embodiments according to the fourth aspect, the applicator may additionally include, particularly after heat treatment, attaching the release liner to the adhesive layer by lamination.

[0052] In some embodiments of the fourth aspect, the temporary tattoo ink may contain one or more solvents between about 30% and about 90% by weight, one or more compounds between about 1% and about 30% by weight, and / or one or more semi-permanent colorants between about 1% and about 20% by weight.

[0053] In some embodiments of the fourth aspect, one or more compounds may comprise pentanediol.

[0054] In some embodiments according to the fourth aspect, the adhesive layer may comprise a rubber adhesive, consist essentially of a rubber adhesive, or be composed of a rubber adhesive.

[0055] In a fifth aspect, this disclosure relates to the use of one or more compounds selected from the group consisting of 1,3-butanediol, pentanediol, hexanediol, and mixtures thereof in temporary tattoo inks for preventing or reducing the transfer of printed temporary tattoo inks to a release liner. Attached Figure Description

[0056] Figure 1 An exploded view of the applicator according to the first aspect is shown. Detailed Implementation

[0057] Specific embodiments of this disclosure will be given below. The terms or words used in the specification and aspects of this disclosure should not be construed as having only a common linguistic or dictionary meaning, and unless otherwise expressly defined in the following description, should be interpreted as having their ordinary technical meaning as determined in the relevant art. Specific embodiments will better illustrate this disclosure, but it should be understood that the presented disclosure is not limited to these specific embodiments.

[0058] Semi-permanent pigments can be incorporated into applicators (e.g., stickers) to facilitate the application of semi-permanent tattoos by a user. The applicator may have a predefined pattern including the semi-permanent pigment, which defines the design of the semi-permanent tattoo. To manufacture an applicator for semi-permanent tattoos, the semi-permanent pigment can be mixed with other compounds, such as solvents, to form a temporary tattoo ink. The temporary tattoo ink can be printed in the form of a predefined pattern onto an adhesive layer disposed on a carrier pad. To apply the semi-permanent tattoo, the adhesive layer can then be placed on the skin portion intended to display the semi-permanent tattoo, where the semi-permanent pigment can diffuse into the skin.

[0059] Using the aforementioned applicator to apply semi-permanent tattoos offers several advantages. First, it allows users to apply semi-permanent tattoos in a single step without requiring considerable effort. Additionally, applying temporary tattoo ink to the adhesive layer via printing allows for high-throughput manufacturing with precise designs. Furthermore, the aforementioned tattoos may not require wetting with water to transfer the design onto the skin.

[0060] However, it has been found that semi-permanent pigments may not diffuse evenly into the skin from the applicator. In fact, the resulting semi-permanent tattoo may appear mottled. The term "mottled semi-permanent tattoo" in this article refers to a semi-permanent tattoo that includes areas of (unintended) color intensity difference, particularly concerning the result obtained on the skin. Without being bound by theory, it is believed that this may occur due to the interaction of the adhesive layer, temporary tattoo ink, and release liner.

[0061] It has been surprisingly found that by incorporating one or more compounds selected from the group consisting of 1,3-butanediol, pentanediol, hexanediol, or mixtures thereof into temporary tattoo inks applied to an adhesive layer, the resulting tattoos can be significantly reduced in terms of their mottled appearance.

[0062] To avoid being bound by theory, it is assumed that the aforementioned alkyl diols possess slight surfactant properties, which may be beneficial in promoting the uniform spreading of (dried) ink on the adhesive layer. This view is based on the observation that the aforementioned tattoo patch comprises a carrier pad, an adhesive layer on which the tattoo design is printed, and a release liner. The release liner is a material layer, such as a piece of paper, attached to the adhesive layer opposite the carrier pad. The release liner protects the adhesive layer and the design thereon during storage and transportation. Release liners are configured for easy peeling; however, they need to adhere sufficiently to prevent premature peeling. It has been found that the quality of the design may deteriorate after the release liner is removed, particularly when backlit with light in the visible spectrum, where the design may appear mottled. Specifically, some areas of the design may be transparent, while other parts may appear opaque when backlit. It has been found that the observable mottleness of the design is directly related to the mottleness of the resulting semi-permanent tattoo. The color of the semi-permanent pigment can become apparent over time, and therefore, the mottleness of the tattoo may only be visible after 12 to 24 hours. Specifically, areas with opaque patterns when backlit resulted in lower color intensity in the semi-permanent tattoo compared to areas with transparent patterns. In some cases, after removing the release liner, (almost) all patterns appeared opaque, leading to semi-permanent tattoos with lower color intensity compared to those with transparent patterns. Therefore, it is believed that the aforementioned diols already provide their beneficial effects to the ink when applied to the adhesive layer, and primarily do not act on the skin in a cosmetic mode of action (skin penetration, moisturizing effects, etc.).

[0063] Furthermore, the aforementioned diols can allow for the provision of temporary tattoo inks that are still suitable for printing, particularly inkjet printing, and suitable for skin contact.

[0064] Temporary tattoo ink

[0065] Therefore, in a first aspect, this disclosure relates to a temporary tattoo ink comprising one or more semi-permanent colorants, and one or more compounds selected from the group consisting of 1,3-butanediol, pentanediol, hexanediol, or mixtures thereof.

[0066] In some embodiments of the first aspect, one or more compounds may specifically comprise pentylene glycol. In some embodiments of the first aspect, one or more compounds may be present in an amount between about 1% to about 30% by weight, more specifically between about 5% to about 25% by weight, and particularly between about 10% to about 20% by weight, relative to the total weight of the temporary tattoo ink.

[0067] The term "colorant" is well-known and is particularly attributed to its common meaning in the art. Additionally or alternatively, the term "colorant" can refer to a substance that alters the color of reflected or transmitted light due to wavelength-selective absorption. As used herein, "color" refers to the wavelength of electromagnetic radiation visible to the human eye. The term "semi-permanent colorant" is well-known and is particularly attributed to its common meaning in the art. Additionally or alternatively, the term "semi-permanent colorant" can refer to a colorant that penetrates one or more layers of the skin and cannot be removed from the skin without physical damage or natural shedding. For example, a semi-permanent colorant can penetrate the stratum corneum and / or epidermis and react with other molecules, such as other colorant molecules and / or other molecules present in the stratum corneum and / or epidermis, such that the semi-permanent colorant is fixed within the stratum corneum and / or epidermis. For example, a semi-permanent colorant can cross-link with collagen present in the stratum corneum and / or epidermis. In some embodiments of the first aspect, the semi-permanent colorant can react with other molecules, such as other colorant molecules and / or other molecules present in the stratum corneum and / or epidermis, to form molecules too large to diffuse out of the stratum corneum and / or epidermis. In some embodiments of the first aspect, the semi-permanent colorant penetrates the stratum corneum and / or epidermis, and the colorant residence time is determined by the natural skin exfoliation process. In some embodiments of the first aspect, the semi-permanent colorant cannot be washed off by, for example, water, soap, and / or isopropyl alcohol. In some embodiments of the first aspect, the semi-permanent colorant comprises natural or synthetic pigments or dyes. In some embodiments of the first aspect, the semi-permanent colorant may contain a colorant precursor, such as a molecule like genipin, that exhibits color when reacting with one or more other molecules.

[0068] In some embodiments of the first aspect, one or more semi-permanent colorants may comprise a colorant precursor. In some embodiments of the first aspect, the colorant precursor is genipin. Thus, in some embodiments of the first aspect, the semi-permanent colorant may comprise genipin or genipin derivatives, particularly purified genipin. As used herein, “genipin” refers to genipin extracts, partially purified genipin extracts, and / or purified genipin, as further described herein. The term “purified genipin” may refer to a semi-permanent colorant comprising at least about 90% by weight, more specifically at least about 95% by weight, and particularly at least about 98.5% by weight of genipin relative to the total weight of the semi-permanent colorant. Genipin is derived from iridoid glycosides known as genipin glycosides, which are found in nearly 40 plant species. Genipin may be derived, for example, from the plant Genipa americana, particularly its fruit. The plant *Genipa chinensis* is also known as jagua, caruto, huito, jenipapo, genipapa, guaitil, tapaculo, yigualtí, shagua, xagua, maluco, vito, ñandipá, or bí. Genipin can also be derived, for example, from *Gardenia jasminoides*, particularly its fruit. Genipa is also sold under the names Jagua-extract or Genipa-food extract. Additionally, genipin is a precursor to gardenia blue, which undergoes free radical polymerization and / or oligomerization upon exposure to amines to form a blue colorant (see, for example, Touyama et al., Chem. Pharm. Bull. 42:668-673, 1994; and Touyama et al., Chem. Pharm. Bull. 42(8):1571-1578, 1994; both of which are incorporated herein by reference in their entirety). When placed in contact with the skin, genipin can react with amines in the skin to produce a blue color in situ based on polymers and / or oligomers. The penetrating distribution of genipin can determine the color concentration distribution in the stratum corneum and / or epidermis, as polymer- and / or oligomer-based blue colorants are too large to penetrate the skin at relevant concentrations.

[0069] In some embodiments of the first aspect, the semi-permanent colorant may be present in an amount between about 1% to about 20% by weight, more specifically between about 3% to about 15% by weight, and particularly between about 5% to about 10% by weight, relative to the total weight of the temporary tattoo ink.

[0070] In some embodiments of the first aspect, the temporary tattoo ink may comprise one or more solvents, more specifically one or more polar solvents, and particularly, the solvents may be selected from the group consisting of water, ethanol, or mixtures thereof. The solvents may dissolve semi-permanent colorants, such as genistein and / or other components, such as matrix components. The solvents, particularly their amounts, may also be adjusted to adjust the viscosity of the temporary tattoo ink. In some embodiments of the first aspect, one or more solvents may be present in an amount between about 30% by weight and about 90% by weight, more specifically between about 50% by weight and about 85% by weight, and particularly between about 65% by weight and about 80% by weight, relative to the total weight of the temporary tattoo ink. In some embodiments of the first aspect, the solvents may comprise water and ethanol, more specifically, the ratio between water and ethanol may be between about 1:1 and about 1:2, more specifically between about 1:1.3 and about 1:1.8. In some embodiments of the first aspect, the temporary tattoo ink may contain less than 1% by weight, more specifically less than 0.1% by weight of gelling agent relative to the total weight of the temporary tattoo ink, and in particular, it contains no or substantially no diethylene glycol monoethyl ether.

[0071] Temporary tattoo inks may contain one or more additional colorants, particularly one or more temporary colorants. The term "temporary colorant" is well-known and is particularly due to its common meaning in the art. Additionally or alternatively, the term "temporary colorant" may refer to a colorant that is located on top of the skin, or that, if it penetrates the skin, can diffuse out of the skin or can be washed off, for example, with water, soap, and / or isopropyl alcohol. As mentioned above, semi-permanent colorants such as genipin may require time to fully develop their color. Additional colorants can make the applied temporary tattoo visible immediately after application. In some embodiments according to the first aspect, the additional colorant (particularly a temporary colorant) may be present in an amount between about 0.05% by weight and about 1% by weight, more specifically between about 0.1% by weight and about 0.5% by weight, relative to the total weight of the temporary tattoo ink. In some embodiments according to the first aspect, one or more temporary colorants may be selected from the group consisting of: iron oxide black (Fe3O4), iron oxide (FeO), carbon, sappanwood, ochre, cinnabar (HgS), cadmium red (CdSe), iron(III) oxide (Fe2O3), naphthol-AS pigment, diazodiaryl compounds, diazopyrazolone, cadmium selenide sulfide, cadmium yellow (CdS, CdZnS), turmeric yellow, chrome yellow (PbCrO4), and diazo... Diaryl compounds, chromium oxide (Cr2O3), malachite [Cu2(CO3)(OH)2], ferrocyanide, ferricyanide, lead chromate, monoazo pigments, Cu / Al phthalocyanine, Cu phthalocyanine, azure blue, cobalt blue, Cu-phthalocyanine, manganese violet (manganese ammonium pyrophosphate), aluminum salts, quinacridone, dioxazine / carbazole, lead white (lead carbonate), titanium dioxide (TiO2), barium sulfate (BaSO4), zinc oxide, anthraquinone dyes and derivatives, mahogany, caramel, β-carotene. Bismuth citrate, disodium copper EDTA, sodium copper potassium chlorophyllin, dihydroxyacetone, bismuth oxychloride, guaiac blue oleane, henna, ferric ammonium ferrocyanide, ferric ferrocyanide, chromium hydroxide green, chromium oxide green, guanine, lead acetate, pyrophyllite, mica, silver, titanium dioxide, aluminum powder, bronze powder, copper powder, ultramarine, manganese violet, zinc oxide, luminescent zinc sulfide, D&C black No. 2 and No. 3, FD&C blue No. 1 (e.g., Acid Blue 9), D&C blue No. 4, D&C brown No. 1, FD&C green The following are colorants: No. 3, D&C Green Nos. 5, 6 and 8, D&C Orange Nos. 4, 5, 10 and 11, FD&C Red No. 4, D&C Red Nos. 6, 7, 17, 21, 22, 27, 28, 30, 32, 33, 34, 36 and 40, D&C Purple No. 2, Ext.D&C Purple No. 2, FD&C Yellow Nos. 5 and 6, D&C Yellow Nos. 7, 8, 10 and 11, and Ext.D&C Yellow No. 7. In some embodiments according to the first aspect, the temporary colorant does not contain amine groups.In some embodiments of the first aspect, the temporary colorant is Acid Blue 9.

[0072] The temporary tattoo ink according to the first aspect can be used to print patterns on an applicator. Therefore, in some embodiments of the first aspect, the temporary tattoo ink is suitable for printing, particularly inkjet printing. In some embodiments of the first aspect, the temporary tattoo ink can be an inkjet printer ink composition. The temporary tattoo ink may contain additional components that can improve its printability, for example, by adjusting its viscosity and / or surface tension. In some embodiments of the first aspect, the composition may be configured to have (or may have) a viscosity of about 1 centipoise to about 7 centipoise at 20°C. In some embodiments of the first aspect, the composition may be configured to have (or may have) a viscosity of about 3 centipoise to about 6 centipoise at 20°C. In some embodiments of the first aspect, the composition may be configured to have (or may have) a surface tension of about 20 dynes / cm to about 35 dynes / cm, more specifically between about 25 dynes / cm and 30 dynes / cm. In some embodiments according to the first aspect, the temporary tattoo ink may contain less than 1% by weight, more specifically less than 0.1% by weight of gelling agent relative to the total weight of the temporary tattoo ink, and particularly contains no or substantially no gelling agent. In some embodiments according to the first aspect, the temporary tattoo ink may contain less than 1% by weight, more specifically less than 0.1% by weight of gelling agent relative to the total weight of the temporary tattoo ink, and particularly contains no or substantially no binder. Gelling agents and binders can significantly increase the viscosity of the temporary tattoo ink, making it unsuitable for printing, particularly inkjet printing. Viscosity can be measured, for example, using a Brookfield Ametek DVE viscometer of model DVEELVTJ0, which has a UL adapter for viscosities below 10 centipoise. Surface tension and contact angle can be measured using a Kruss tensiometer using the du Noüy ring method according to ASTM D1331-20.

[0073] In some embodiments according to the first aspect, temporary tattoo ink may contain a surfactant. The term "surfactant" is well known and is particularly due to its common meaning in the art. Additionally or alternatively, the term "surfactant" may refer to a substance that tends to reduce the surface tension of a liquid in which it is dissolved. Non-limiting examples of surfactants include alkylbenzene sulfonates, alkyl sulfates, alkyl ether sulfates, soaps, ethoxylates, alkyl alcohols, lignin sulfonates, and triglycerides. For example, surfactants may include sodium dodecylbenzene sulfonate, lauryl sulfate, dialkyl sulfosuccinate, dimethyl tetradecylphosphonate, lauryl monoethanol, diglycerides (diglycerides), dodecyl betaine, rosin acid, polyethoxylated octylphenol, and 1,2-hexanediol (e.g., OPTIPHEN). ® HD) and dehydrated sorbitan monoester. In some embodiments according to the first aspect, the surfactant may be a diol, and particularly 1,2-hexanediol. The surfactant, particularly 1,2-hexanediol, can reduce the surface tension of the temporary tattoo ink, which can improve the printing quality of the ink. In addition, the surfactant, particularly 1,2-hexanediol, can improve the skin penetration of the semi-permanent colorant. In some embodiments according to the first aspect, the surfactant may be present in an amount between about 0.1% by weight and about 6% by weight, more specifically between about 0.5% by weight and about 4% by weight, and particularly between about 1% by weight and about 3% by weight, relative to the total weight of the temporary tattoo ink.

[0074] In some embodiments of the first aspect, the temporary tattoo ink may comprise a matrix component. In some embodiments of the first aspect, the matrix component may comprise a polyol. The matrix component can provide mechanical stability to the pattern. Furthermore, a semi-permanent colorant may be partially embedded in the matrix component in the final applicator, which reduces the rate at which the semi-permanent colorant diffuses onto the release liner. When applied to the skin, for example by being slightly moistened by sweat, the matrix component can release the semi-permanent colorant. Additionally, the matrix component can increase the resolution of the printed image. Not wishing to be bound by theory, the matrix component may form hydrogen bonds with the ink used for printing and / or with the semi-permanent colorant during the drying process, which can reduce the mobility of the semi-permanent colorant and thereby blur the printed image, for example by preventing the semi-permanent colorant from diffusing onto or into the adhesive layer, particularly along the surface of the adhesive layer.

[0075] As used herein, a polyol means an alcohol containing at least three hydroxyl groups, particularly at least four hydroxyl groups. Polyols may include, for example, monosaccharides, disaccharides, oligosaccharides such as trisaccharides, sugar alcohols, or other short-chain polymeric polyols. Optionally, as used herein, a polyol may include polyol derivatives that may have other hydrophilic groups incorporated therein, such as ethylene oxide derivatives containing hydroxyl groups.

[0076] In some embodiments according to the first aspect, the polyol (of the matrix component) may be a polyol capable of redispersibility in an aqueous medium, and in particular, the polyol may be water-soluble. The term "water-soluble polyol" in this disclosure may refer to a polyol having a water solubility greater than 0.5 g / dL, more specifically greater than 10 g / dL, and particularly greater than 50 g / dL at 20°C. As mentioned above, the matrix component may release a semi-permanent colorant when wetted by sweat. Not wishing to be bound by theory, when containing a polyol, the matrix component may partially dissolve upon absorbing water (e.g., from sweat), thereby allowing a higher diffusion rate of the semi-permanent colorant toward the skin. Still not wishing to be bound by theory, the matrix component may bind to the semi-permanent colorant by forming hydrogen bonds with it, which are dissolved by water permeating into the pattern, thereby allowing increased mobility of the semi-permanent colorant. The matrix component may also improve the transfer of the pattern to the skin by acting as a hygroscopic substance, thereby absorbing sweat from the skin.

[0077] In some embodiments of the first aspect, the polyol may have a molar mass of at least 100 g / mol, more specifically at least 200 g / mol, and particularly at least 300 g / mol. The matrix component may be a solid at 0°C, more preferably a solid at 20°C, even more specifically a solid at 30°C, and particularly a solid at 45°C. In some embodiments of the first aspect, the polyol may be a solid at 0°C, more preferably a solid at 20°C, even more specifically a solid at 30°C, and particularly a solid at 45°C.

[0078] In some embodiments of the first aspect, the matrix component may be selected from the group consisting of sugars, sugar alcohols, and polymers. In some embodiments of the first aspect, the sugar may be selected from the group consisting of trehalose, glucose, fructose, galactose, ribose and xylose, trehalose, sucrose, lactotrehalose, galactotrehalose, 6-azidotrehalose, maltose, lactose, lactulose, cellobiose, chitobiose, starch, glycogen, cellulose, and chitin. In some embodiments of the first aspect, the matrix component may be trehalose. In some embodiments of the first aspect, the matrix component may be present in an amount between about 0.1% by weight and about 6% by weight, more specifically between about 0.5% by weight and about 4% by weight, and particularly between about 1% by weight and about 3% by weight, relative to the total weight of the temporary tattoo ink. One or more of the above compounds may also help dissolve the semi-permanent colorant. When the solubility of the semi-permanent colorant is improved, its distribution and embedding in the matrix component can be improved, which can also result in less mottledness, especially after a longer storage period.

[0079] In some embodiments of the first aspect, the temporary tattoo ink may further comprise one or more preservatives. In some embodiments of the first aspect, the one or more preservatives may be present in an amount from about 0.5% by weight to about 1.5% by weight relative to the total weight of the temporary tattoo ink. In some embodiments of the first aspect, the one or more preservatives may be present in an amount from about 1% by weight relative to the total weight of the temporary tattoo ink.In some embodiments according to the first aspect, one or more preservatives may be selected from the group consisting of: ascorbic acid, ascorbate, palmitate, citric acid, benzoate, benzoic acid, propionate, propionic acid, sorbate, sorbic acid, salicylic acid, salicylate, hexanoic acid, hexanoic acid, formaldehyde, formaldehyde releaser, formic acid and its salts, 3-acetyl-6-methylpyran-2,4-(3H)-dione and its salts, 3,3'-dibromo-4,4'-hexamethylenedioxybenzoic acid and its salts, thimerosal, phenylmercuric acid, undecanoic acid and its salts, 1,3-bis(2-ethylhexyl)hexahydro-5-methyl-5-pyrimidine, 5-bromo-5- Nitro-1,3-dioxane, bromonitrol, 2,4-dichlorobenzyl alcohol, 1-(4-chlorophenyl)-3-(3,4-dichlorophenyl)urea, chlorocresol, chloroxylenol, 5-chloro-2-(2,4-dichlorophenoxy)phenol, N,N″-methylenebis[N′-[3-(hydroxymethyl)-2,5-dioxoimidazolidine-4-yl]urea], polyaminopropyl biguanide, hexamethylenetetramine, quaternium-15, clomiphene, DMDM ​​hydantoin, benzyl alcohol, 1-hydroxy-4-methyl-6-(2,4,4-trimethylpentyl)-2-pyridone, piroctone ethanolamine, bromochlorofen, o-cymene-5-ol, benzylchlorophenol, chloroacetamide, methylchloroisothiazolinone, methylisothiazolinone, benzylchlorophenol Oxyisopropanol, Chlorhexidine, Chlorhexidine diacetate, Chlorhexidine digluconate, Chlorhexidine dihydrochloride, Dimethyloxazolidine, Docosyltrimethylammonium chloride, Hexadecyltrimethylammonium bromide, Hexadecyltrimethylammonium chloride, Lauryltrimethylammonium bromide, Lauryltrimethylammonium chloride, Stearyltrimethylammonium bromide, Stearyltrimethylammonium chloride, Diazoalkylurea, Hexamidine, Hexamidine dihydroxyethylsulfonic acid, Hexamidine p-hydroxybenzoate, Glutaraldehyde, 7-Ethylbicyclooxazolidine, Chlorphenesin, Sodium hydroxymethylglycinate, Silver chloride, Benzyl chloride, Benzalkonium chloride, Benzalkonium bromide, Benzalkonium saccharin ammonium, Benzyl hemiacetal, Iodopropynyl butylcarbamate, Biphenyl-2-ol and its salts, Zinc pyrithione, Isoprene The preservatives include thionate, nitrite, ethylenediaminetetraacetic acid (EDTA), butylated hydroxyanisole (BHA), butylated hydroxytoluene (BHT), caprylic acid, dilauryl thiodipropionate, isoascorbic acid, guaiac resin, methylparaben, sulfite, bisulfite, metabisulfite, propyl gallate, propylparaben, stannous chloride, sulfur dioxide, thiodipropionate, isothiazolin, parabens, phenoxyethanol, ethylhexylglycerin, ethylene glycol, and tocopherol. In some embodiments according to the first aspect, one or more preservatives may be phenoxyethanol and ethylhexylglycerin. A 90:10 mixture of phenoxyethanol and ethylhexylglycerin may be marketed under the trade name EUXYL. ®PE9010 was obtained by Ashland Global Speciality Chemical Inc. (USA).

[0080] Applicator

[0081] In a second aspect, this disclosure relates to an applicator for applying a pattern comprising a semi-permanent colorant. The applicator includes a carrier pad and an adhesive layer, and a pattern disposed on and / or therein in the adhesive layer, wherein the pattern comprises a semi-permanent colorant and one or more compounds selected from the group consisting of 1,3-butanediol, pentanediol, hexanediol, or mixtures thereof.

[0082] In some embodiments according to the second aspect, the applicator may include a release liner, particularly a removable release liner.

[0083] In the final applicator according to the second aspect, the content of one or more compounds selected from the group consisting of 1,3-butanediol, pentanediol, hexanediol, or mixtures thereof may be relatively low. The applicator may undergo heat treatment (discussed below), in which a significant amount of one or more compounds may evaporate. Furthermore, one or more compounds may evaporate during storage. However, it has been found that the inclusion of these one or more compounds in temporary tattoo inks used to form patterns (even if retained in small amounts in the applicator) significantly reduces mottledness after removal of the release liner, regardless of the drying step following printing. In some embodiments according to the second aspect, the pattern containing the semi-permanent colorant may contain one or more compounds selected from the group consisting of 1,3-butanediol, pentanediol, hexanediol, or mixtures thereof, at a concentration relative to the total weight of the pattern of about 0.01 wt% to about 30 wt%, more specifically between about 0.05 wt% and about 25 wt%, and particularly between about 0.1 wt% and about 20 wt% of the total weight of the pattern. In some embodiments according to the second aspect, the pattern containing the semi-permanent colorant may contain one or more compounds selected from the group consisting of 1,3-butanediol, pentanediol, hexanediol, or mixtures thereof, in an amount between about 0.01 wt% and about 5 wt% relative to the total weight of the pattern, more specifically between about 0.05 wt% and about 3 wt%, and particularly between about 0.1 wt% and about 2 wt%.

[0084] In some embodiments according to the second aspect, the carrier pad has a first side and a second side, wherein an adhesive layer may be disposed on at least about 50%, more specifically at least 70%, and particularly at least 90% of the total surface area of ​​at least the second side. In particular, the adhesive layer may be disposed on the entirety of at least the second side of the carrier pad. An adhesive layer covering a high proportion of the surface area of ​​the second side of the carrier pad can improve the adhesion of the carrier to the skin when applied.

[0085] In some embodiments according to the second aspect, the pattern may be disposed on and / or therein less than 95%, more specifically less than 90%, and particularly less than 85% of the total surface area of ​​the adhesive layer facing away from the carrier liner. In other words, the adhesive layer may have a first side and a second side, and the first side of the adhesive may contact the second side of the carrier liner, and the pattern may be disposed on the second side of the adhesive. Thus, at least a portion of the adhesive layer may be available for contact with the skin. Furthermore, the adhesive layer according to the second aspect may not include the pattern itself, but rather provide the pattern as a separate entity. An adhesive layer including a pattern allows less semi-permanent colorant to diffuse into the skin compared to a pattern disposed on the adhesive layer. However, the pattern may have already partially diffused into the adhesive layer.

[0086] The applicator may rely solely on residual solvents and sweat in the pattern to transfer the semi-permanent colorant from the pattern to the skin. Specifically, the applicator may not require water to transfer the pattern or the semi-permanent colorant contained within the pattern to the skin. In some embodiments according to the second aspect, the carrier pad comprises a water-resistant or waterproof polymer, is substantially composed of a water-resistant or waterproof polymer, or is composed of a water-resistant or waterproof polymer, particularly a waterproof polymer. Therefore, in some embodiments according to the second aspect, the carrier pad may be water-resistant or waterproof. The term "water-resistant carrier pad" in this disclosure refers to a carrier pad that, when in contact with a damp sponge cloth on the first surface, does not show a detectable increase in moisture on the second surface after at least 10 minutes of contact. The term "water-resistant carrier pad" in this disclosure refers to a carrier pad that, when in contact with a damp sponge cloth on the first surface, does not show a detectable increase in moisture on the second surface after at least 1 hour of contact. The damp sponge cloth may be, for example, a sponge cloth comprising 75% cellulose and 25% cotton, with a thickness in the dry state between about 2 mm and about 10 mm. The sponge fabric should be fully immersed in water for 5 minutes, and then excess water should be released by hanging it for 5 minutes (e.g., attached to a hanging pin). This can be tested, for example, using the "Vileda Original Schwammtuch" from Vileda GmbH (Weinheim, Germany). Moisture content can be detected using a moisture meter (e.g., the MM7 Pin type moisture meter available from General Tool Inc. (Irvine, California). An increase in moisture content of at least 15%, more specifically at least 20%, can be considered a "detectable increase in moisture." The temperature of the damp sponge fabric needs to be at least ambient temperature to prevent condensation on the second surface of the carrier pad.

[0087] In some embodiments according to the second aspect, the adhesive layer may comprise a rubber adhesive, a silicone adhesive, a polyurethane adhesive, a hydrogel adhesive, a hydrocolloid adhesive, an acrylic adhesive, and / or a dry adhesive. In particular, in some embodiments according to the second aspect, the adhesive layer comprises a rubber adhesive, is substantially composed of a rubber adhesive, or is composed of a rubber adhesive. The rubber adhesive may be, for example, a styrene copolymer adhesive.

[0088] In some embodiments according to the second aspect, the adhesive layer may comprise a pressure-sensitive adhesive. A pressure-sensitive adhesive may be advantageous because it does not require activation, for example, by water. The term "activation of the adhesive layer" refers to applying an external stimulus other than pressure to the adhesive layer to cause it to adhere to a surface, such as skin. The external stimulus may be one or more of heat, dryness, shear, UV light, or the addition of other substances. In some embodiments according to the second aspect, the adhesive layer and / or pattern may be in direct contact with a release liner, more specifically a membrane, and / or a coating incorporated into or included in the membrane.

[0089] Furthermore, the adhesive can be configured not to transfer to the skin. For example, the decal may include an adhesive layer disposed on a carrier liner and an additional absorbent layer. A water-soluble sliding layer may be disposed between the absorbent layer (e.g., porous paper) and the carrier liner. The water-soluble sliding layer allows the adhesive layer and the carrier to transfer from the absorbent layer to the skin during application. However, the combination of the carrier liner and the adhesive layer may leave a sticky residue on the skin. In some embodiments according to the second aspect, the adhesive layer may be water-insoluble. The term "water-insoluble adhesive layer" in this disclosure may refer to an adhesive layer having a water solubility of less than 0.25 g / dL, more specifically less than 0.1 g / dL, and particularly less than 0.05 g / dL at 20°C. In some embodiments according to the second aspect, the applicator may not include a water-soluble sliding layer and / or an absorbent layer. Furthermore, in some embodiments according to the second aspect, the carrier liner may be the outer layer of the applicator.

[0090] In some embodiments according to the second aspect, the adhesive layer may have a thickness between about 5 µm and about 200 µm, more specifically between about 20 µm and about 100 µm, and particularly between about 30 µm and about 80 µm. The thickness may be measured from the carrier pad to the top of the adhesive layer, excluding the pattern. The thickness of the adhesive layer should be measured at the portion on which no pattern is provided.

[0091] As explained above, the applicator of this disclosure can be manufactured by inkjet printing. Compared to applicators manufactured by, for example, screen printing, inkjet-printed applicators may be much more susceptible to mottled effects because they may be finer, as they are applied in the form of tiny droplets that dry to form spots. In some embodiments according to the second aspect, the pattern may include a plurality of spots, wherein the plurality of spots may have an average maximum diameter between about 10 µm and about 500 µm, more specifically between about 50 µm and about 250 µm, and particularly between about 75 µm and about 130 µm. The average maximum diameter of the spots can be determined using a microscope and averaged over 30 spots.

[0092] In some embodiments of the second aspect, the release liner may be disposed on and / or attached to the pattern. In some embodiments of the second aspect, the release liner may be disposed on and / or attached to the pattern and adhesive layer, particularly on the opposite side of the adhesive layer to which the carrier liner is attached. In some embodiments of the second aspect, the release liner may comprise a non-adhesive material. In some embodiments of the second aspect, the release liner may comprise a pull tab to facilitate release of the release liner. In some embodiments of the second aspect, the release liner may comprise a polymer, particularly polyethylene terephthalate, and / or paper, particularly kraft paper. In some embodiments of the second aspect, the release liner may comprise a film, particularly a polymer film. It has been found that release liners comprising films can produce less mottledness after removal of the release liner. This is believed to be due to the lower surface roughness of the film compared to paper. In some embodiments of the second aspect, the average surface roughness of the film, as measured according to ISO 21920-2:2021, may be less than 3 µm, more specifically less than 1 µm, and particularly less than 500 nm. In some embodiments according to the second aspect, the average surface roughness of the membrane, as measured according to ISO 21920-2:2021, may be between about 0.5 nm and about 500 nm, more specifically between about 1 nm and about 300 nm, and particularly between about 3 nm and about 100 nm. In some embodiments according to the second aspect, the release liner may comprise a polymer or coated paper. For example, the release liner may comprise a silicone coating, more specifically a fluorosilicone and / or a non-halogenated silicone coating, particularly a polydimethylsiloxane coating. The silicone coating may be configured to reduce adhesion between the release liner and the adhesive layer and / or pattern. It has been found that silicone coatings comprising non-halogenated silicones (especially polydimethylsiloxane), or substantially composed of non-halogenated silicones (especially polydimethylsiloxane), can produce lower mottledness after removal compared to fluorosilicone coatings. Furthermore, fluorosilicones are an environmental concern. Furthermore, it has been found that the extractability of the silicone coating can affect mottledness; more specifically, higher extractability of the silicone coating may lead to increased mottledness, particularly after prolonged storage. Not wishing to be bound by theory, it is believed that silicone extractables can be transferred from the silicone coating to the top of the pattern. The transferred silicone extractables can reduce the rate of genipin diffusion into the skin by forming a barrier. Therefore, in some embodiments according to the second aspect, the silicone coating can exhibit extractability of less than 10 µg / cm² silicone, more specifically less than 1 µg / cm² silicone, and particularly less than 100 ng / cm² silicone.In some embodiments according to the second aspect, the silicone coating may exhibit extractability of less than 5% by weight of silicone, more specifically less than 3% by weight of silicone, and particularly less than 2% by weight of silicone relative to the total weight of the silicone coating. Extractability may be tested according to ISO 10993-18:2020. Alternatively or additionally, extractability may be tested by immersing the release liner in a solvent selected from methyl isobutyl ketone, xylene, and toluene for 25 hours. Subsequently, the amount of silicone may be measured using atomic absorption spectrometry or inductively coupled plasma mass spectrometry. The total weight of the coating may be measured, for example, by X-ray fluorescence. The release liner may be sourced, for example, from Fox River Associates (PonteVedra, Florida, USA).

[0093] An exemplary exploded view of the applicator 100 according to the second aspect is depicted in Figure 1 As shown in the image. Figure 1 The applicator 100 includes an adhesive layer 120 disposed on a carrier liner 110. A pattern 130 is disposed on the adhesive layer 120. A release liner 140 is disposed on the pattern 130 and the adhesive layer 120 (depicted at a distance for overview purposes).

[0094] In some embodiments according to the second aspect, the release liner may have a thickness between about 10 µm and about 400 µm, more specifically between about 30 µm and about 250 µm, and particularly between about 40 µm and about 180 µm. As summarized above, the applicator of this disclosure can be manufactured by inkjet printing. For the inkjet printing process and the subsequent drying process, the carrier liner may be provided with a support layer attached to the carrier liner, which increases the stiffness of the carrier liner. The increased stiffness can improve the processability of the carrier liner, for example, by preventing the carrier liner from wrinkling. However, the support layer subsequently needs to be removed from the applicator because otherwise the applicator may not be properly aligned with the user's skin due to the increased stiffness. However, the applicator may wrinkle during removal, for example, by delamination. An increased thickness film laminated onto the applicator prior to delamination can help prevent the applicator from wrinkling, for example, by increasing the stiffness of the applicator. Furthermore, carrier liners with an adhesive layer can be supplied in large sheets, which are printed in one go and then cut into individual applicators. A thicker film also helps allow for precise cutting without damaging the applicator. Additionally, applicators may unintentionally curl after cutting due to water absorption. Using a thicker film can reduce curling. Finally, release liner comprising a film with increased thickness or consisting of a film with increased thickness allows for the use of carrier liners with smaller thickness and / or higher flexibility, as this provides sufficient mechanical stability for the applicator. Thinner carrier liners can improve alignment between the carrier liner and the skin.

[0095] In some embodiments according to the second aspect, the carrier liner may have a thickness between about 10 µm and about 300 µm, more specifically between about 30 µm and about 150 µm, and particularly between about 40 µm and about 100 µm.

[0096] The pattern of the applicator according to the second aspect may include all or some of the components of the temporary tattoo ink according to the second aspect. As described above, the applicator according to the second aspect can be subjected to heat treatment, which can cause evaporation of the volatile and / or semi-volatile components of the temporary tattoo ink. Furthermore, the volatile and / or semi-volatile components may evaporate during storage. In some embodiments of the second aspect, the pattern may contain a semi-permanent colorant. In some embodiments of the second aspect, the pattern may contain one or more compounds selected from the group consisting of 1,3-butanediol, pentanediol, hexanediol, or mixtures thereof (albeit in trace amounts). In some embodiments of the second aspect, the pattern may contain a matrix component, a surfactant, one or more additional colorants (particularly temporary colorants), a preservative, and / or one or more solvents (albeit again, likely in trace amounts). In some embodiments of the second aspect, a pattern containing a semi-permanent colorant may contain one or more solvents in an amount between about 0.01 wt% and about 90 wt%, more specifically between about 0.05 wt% and about 85 wt%, and particularly between about 0.1 wt% and about 80 wt% relative to the total weight of the pattern. In some embodiments according to the second aspect, the pattern containing the semi-permanent colorant may contain one or more solvents in an amount between about 0.01% by weight and about 9% by weight, more specifically between about 0.05% by weight and about 5% by weight, and particularly between about 0.1% by weight and about 3% by weight relative to the total weight of the pattern.

[0097] In some embodiments of the second aspect, the pattern containing the semi-permanent colorant may contain a matrix component ranging from about 1.5 wt% to about 30 wt%, more specifically from about 5 wt% to about 25 wt%, and particularly from about 10 wt% to about 20 wt% relative to the total weight of the pattern. In some embodiments of the second aspect, the pattern containing the semi-permanent colorant may contain a matrix component ranging from about 5 wt% to about 30 wt%, more specifically from about 10 wt% to about 25 wt%, and particularly from about 15 wt% to about 20 wt% relative to the total weight of the pattern. In some embodiments of the second aspect, the pattern containing the semi-permanent colorant may contain a semi-permanent colorant ranging from about 30 wt% to about 90 wt%, more specifically from about 40 wt% to about 85 wt%, and particularly from about 50 wt% to about 75 wt% relative to the total weight of the pattern.

[0098] In some embodiments according to the second aspect, the applicator may have a shelf life of at least one month, more specifically at least three months, and particularly at least six months at ambient temperature. It has been found that the applicator according to this disclosure is particularly stable during extended storage periods.

[0099] Methods for obtaining an applicator

[0100] In a third aspect, this disclosure relates to an applicator obtained by applying temporary tattoo ink to an adhesive layer disposed on a carrier pad. The temporary tattoo ink comprises one or more semi-permanent colorants, and one or more compounds selected from the group consisting of 1,3-butanediol, pentanediol, hexanediol, or mixtures thereof.

[0101] In some embodiments according to the third aspect, temporary tattoo ink may contain one or more solvents, more specifically one or more polar solvents, and in particular, the solvent may be selected from the group consisting of water, ethanol, or mixtures thereof.

[0102] In some embodiments according to the third aspect, the application of temporary tattoo ink can be performed by printing, particularly inkjet printing. Inkjet printing is a precise, high-throughput method used to produce applicators. Furthermore, inkjet printing allows for easy switching between patterns, thus allowing for the provision of different tattoo designs to the user.

[0103] In some embodiments according to the third aspect, the applicator may additionally include heat treatment, particularly after the temporary tattoo ink has been applied to the adhesive layer. Heat treatment can dry the ink, thereby reducing the risk of subsequent smudging. Furthermore, heat treatment can improve adhesion between the design and the adhesive layer.

[0104] In some embodiments according to the third aspect, the heat treatment may be carried out at a temperature between about 45°C and about 85°C, more specifically between about 55°C and about 75°C, for a duration between about 20 minutes and about 120 minutes, particularly between about 30 minutes and about 60 minutes.

[0105] In some embodiments according to the third aspect, the applicator may additionally include attaching a release liner to the adhesive layer, particularly after heat treatment, by lamination. The release liner according to the third aspect may be consistent with those release liners defined above with respect to the second aspect.

[0106] In some embodiments according to the third aspect, the temporary tattoo ink may contain one or more solvents between about 30% to about 90% by weight, and / or one or more compounds between about 1% to about 30% by weight, and / or one or more semi-permanent colorants between about 1% to about 20% by weight.

[0107] In some embodiments of the third aspect, one or more compounds may comprise pentanediol.

[0108] In some embodiments of the third aspect, the temporary tattoo ink used to obtain the applicator may be the temporary tattoo ink according to the first aspect.

[0109] In some embodiments according to the third aspect, the adhesive layer may comprise a rubber adhesive, consist essentially of a rubber adhesive, or be composed of a rubber adhesive.

[0110] In a fourth aspect, this disclosure relates to a method for manufacturing an applicator for applying a pattern comprising a semi-permanent colorant. The method includes applying temporary tattoo ink onto an adhesive layer disposed on a carrier pad, wherein the temporary tattoo ink comprises one or more semi-permanent colorants and one or more compounds selected from the group consisting of 1,3-butanediol, pentanediol, hexanediol, or mixtures thereof.

[0111] In some embodiments of the fourth aspect, the temporary tattoo ink may contain one or more solvents, more specifically one or more polar solvents, and in particular, the solvent may be selected from the group consisting of water, ethanol, or mixtures thereof.

[0112] In some implementation schemes according to the fourth aspect, the application of temporary tattoo ink can be carried out by printing, particularly inkjet printing.

[0113] In some embodiments of the fourth aspect, obtaining the applicator may additionally include heat treatment, particularly after applying temporary tattoo ink. In some embodiments of the fourth aspect, the heat treatment may be carried out at a temperature between about 45°C and about 85°C, more specifically between about 55°C and about 75°C, for a duration between about 20 minutes and about 120 minutes, particularly between about 30 minutes and about 60 minutes.

[0114] In some embodiments according to the fourth aspect, the applicator may additionally include, particularly after heat treatment, attaching a release liner to the adhesive layer by lamination. The release liner according to the fourth aspect may be consistent with those release liners defined above with respect to the second aspect.

[0115] In some embodiments of the fourth aspect, the temporary tattoo ink may contain one or more solvents between about 30% to about 90% by weight, and / or one or more compounds between about 1% to about 30% by weight, and / or one or more semi-permanent colorants between about 1% to about 20% by weight.

[0116] In some embodiments of the fourth aspect, the temporary tattoo ink used in the method may be the temporary tattoo ink according to the first aspect.

[0117] In some embodiments of the fourth aspect, one or more compounds may comprise pentanediol.

[0118] In some embodiments according to the fourth aspect, the adhesive layer may comprise a rubber adhesive, consist essentially of a rubber adhesive, or be composed of a rubber adhesive.

[0119] In a fifth aspect, this disclosure relates to the use of one or more compounds selected from the group consisting of 1,3-butanediol, pentanediol, hexanediol, and mixtures thereof in temporary tattoo inks for preventing or reducing the transfer of printed temporary tattoo inks to a release liner.

[0120] Example

[0121] Four different temporary tattoo inks were tested to evaluate the effect of different compounds on the mottled appearance of the resulting semi-permanent tattoos. The compositions are listed in Table 1 below.

[0122] Table 1: Temporary tattoo inks tested

[0123] composition Water [weight%] Ethanol [weight %] compound Genipin [weight %] Trehalose [weight %] 1,2-Hexanediol [wt%] Euxyl PE9010 [weight%] Acid Blue 9 [wt%] 1 29.91 42.87 14.96% by weight pentanediol 6.98 1.99 1.99 1.00 0.30 2 29.91 42.87 14.96% by weight of diethylene glycol monoethyl ether 6.98 1.99 1.99 1.00 0.30 3 23 61.2 - 11 1.5 2 1.00 0.30 4 29.91 42.87 14.96% by weight of propylene glycol 6.98 1.99 1.99 1.00 0.30

[0124] The viscosity of the inks was measured using a Brookfield Ametek DVE viscometer (model DVEELVTJ0) with a UL adapter for viscosities below 10 centipoise. The surface tension of the inks was measured using a Kruss tensiometer using the du Noüy ring method according to ASTM D1331-20. Temporary tattoo ink 1 had a viscosity of 4.54 cP and a surface tension of 27.96 dynes / cm. Temporary tattoo ink 2 had a viscosity of 4.06 cP and a surface tension of 28.58 dynes / cm. Temporary tattoo ink 3 had a viscosity of 3.38 cP and a surface tension of 26.59 dynes / cm. Temporary tattoo ink 4 had a viscosity of 4.72 cP and a surface tension of 28.73 dynes / cm.

[0125] Preparation of temporary tattoo ink

[0126] For the temporary tattoo inks in Table 1, the solids (genipin and trehalose) were weighed out. Genipin was then dissolved in ethanol at 800 rpm in a mechanical mixer until completely dissolved (5 to 20 minutes) to form a first solution. Trehalose was dissolved in water at 800 rpm in a mechanical mixer until completely dissolved (5 to 20 minutes) to form a second solution. The first and second solutions were then mixed together. Subsequently, 1,2-hexanediol, Euxyl PE9010, and Acid Blue 9 were added. Additionally, for composition 1, pentanediol was added at this step; for composition 2, diethylene glycol monoethyl ether was added at this step; and for composition 4, propylene glycol was added at this step. The mixture was then mixed again in a mechanical mixer at 800 rpm for 20 minutes. The resulting mixture was placed on a vacuum filter with a 1.2-micron pore size and filtered into a sterile polypropylene flask, and then transferred to a sterile polypropylene wide-mouth bottle.

[0127] Preparation of the applicator

[0128] Temporary tattoo ink is printed onto a 2-mil rubber-based adhesive layer set on a (2.9 mil) polyethylene carrier pad using inkjet printing to form an applicator. The carrier pad is further supported by an 8-mil polypropylene backing. Temporary tattoo inks 1 to 3 are printed onto the adhesive layer in the form of solid rectangles and multiple stripes adjacent to the rectangles. Temporary tattoo ink 4 is printed once in the form of a solid rectangle and multiple stripes adjacent to the rectangle, a tiger, a round tree, and a heart-shaped paw, and twice in the form of a square.

[0129] The applicator was then placed on the sheet and placed in a convection oven. The applicator was heat-treated at 65°C for 45 minutes. The sheet was then cooled at room temperature for 2 minutes.

[0130] The release liner (3.8 mil supercalendered kraft paper coated with fluorosilicone) is then laminated onto the adhesive layer. After lamination, the polypropylene backing layer is removed to obtain the final applicator sample.

[0131] Mottleability test of different temporary tattoo inks

[0132] The mottleability of the pattern after removing the release liner was visually evaluated. For temporary tattoo ink compositions 1 to 3, the release liner was removed after a storage period of at least 15 days. For temporary tattoo ink composition 4, the release liner was removed after a storage period of 1 day and 3 days. The applicator was stored at 21°C ± 2°C and 30% ± 10% relative humidity. The release liner was removed from the applicator by applying a continuous upward pull. Subsequently, the mottleability of the pattern was analyzed by placing the carrier liner in front of background light in the visible spectrum. Each composition was tested using three separate applicators. Table 2 below is used to evaluate the resulting patterns.

[0133] Table 2

[0134]

[0135] All samples made from temporary tattoo ink containing 14.96% by weight pentylene glycol were graded 1. All samples showed a low degree of mottledness, even after a relatively long storage period of at least 4 weeks. Some slight mottledness was observed in several stripes. In addition, apart from the mottled areas observed in several stripes, the printed pattern was generally transparent.

[0136] In samples made from temporary tattoo ink containing 14.96% by weight diethylene glycol monoethyl ether, two samples were graded 3, and one sample was graded 2. Both samples showed multiple opaque marks. Of the two samples, one showed multiple transparent streaks, while the second sample showed multiple mottled streaks. The third sample showed a first transparent area occupying approximately half of a solid rectangular region, and a second mottled, mostly opaque area occupying approximately the second half of the solid rectangular region. The multiple streaks of the third sample showed significant mottledness.

[0137] All three samples, made from temporary tattoo ink without additional compounds, were graded 4. All samples exhibited little to moderate patchiness. However, apart from some smaller areas in several streaks, the printed pattern showed significant opacity, indicating that the resulting semi-permanent tattoo would exhibit lower color intensity.

[0138] For the fourth temporary tattoo ink, the release liner was removed after 1 day from the solid rectangle and multiple stripes adjacent to the rectangle, the tiger, and the first square. The solid rectangle and multiple stripes adjacent to the rectangle, as well as the tiger, were graded 1, and the square was graded 2. For the circular tree, heart-shaped paw, and second square, the release liner was removed after 3 days. The heart-shaped paw was graded 2, and the circular and square trees were graded 3. The test results indicate that propylene glycol is not as suitable as pentylene glycol for preventing patchiness, as the results were already patchy after three days.

[0139] Correlation between the patchiness of the applicator and the patchiness of semi-permanent tattoos

[0140] To assess the correlation between the mottledness of the applicator and the mottledness of the resulting semi-permanent tattoo, multiple mottled and non-mottled applicators were tested. Photographs of the applicator were taken before application to identify areas of mottledness and increased opacity. The applicator was then applied to the skin for 1 hour. The semi-permanent pigment was then allowed to develop for 24 hours. After 24 hours, the skin was washed with water to remove any remaining Acid Blue 9 dye. The mottledness of the skin was then visually assessed. Results showed that graded mottled applicators exhibited mottledness, while non-mottled applicators showed low to no mottledness. Furthermore, by comparing the skin with photographs of the applicator taken before application, it was found that brighter areas of the semi-permanent tattoo on the skin directly corresponded to areas of increased opacity on the applicator.

[0141] aspect

[0142] Although the invention has been defined in the appended claims, it should be understood that the invention may also be defined (alternatively) according to the following embodiments:

[0143] 1. A temporary tattoo ink, said temporary tattoo ink comprising:

[0144] One or more semi-permanent colorants, and

[0145] One or more compounds selected from the group consisting of 1,3-butanediol, pentanediol, hexanediol, or mixtures thereof.

[0146] 2. The temporary tattoo ink according to embodiment 1, wherein one or more compounds comprise pentanediol.

[0147] 3. The temporary tattoo ink according to any of the foregoing embodiments, wherein the semi-permanent colorant comprises genipin or a genipin derivative, particularly purified genipin.

[0148] 4. The temporary tattoo ink according to any of the foregoing embodiments, wherein the temporary tattoo ink comprises one or more solvents, more specifically polar solvents, and particularly, wherein the solvent is selected from the group consisting of water, ethanol, or mixtures thereof.

[0149] 5. The temporary tattoo ink according to any of the foregoing embodiments, wherein the temporary tattoo ink comprises a surfactant, more specifically, wherein the surfactant is a diol, and particularly 1,2-hexanediol.

[0150] 6. The temporary tattoo ink according to any of the foregoing embodiments, wherein the temporary tattoo ink comprises a matrix component, more specifically, wherein the matrix component is a polyol, or even more specifically a disaccharide, and particularly trehalose.

[0151] 7. The temporary tattoo ink according to any of the foregoing embodiments, wherein the semi-permanent colorant is present in an amount between about 1% to about 20% by weight, more specifically between about 3% to about 15% by weight, and particularly between about 5% to about 10% by weight relative to the total weight of the temporary tattoo ink.

[0152] 8. The temporary tattoo ink according to any of the foregoing embodiments, wherein the one or more compounds are present in an amount between about 1% to about 30% by weight, more specifically between about 5% to about 25% by weight, and particularly between about 10% to about 20% by weight relative to the total weight of the temporary tattoo ink.

[0153] 9. The temporary tattoo ink according to any one of embodiments 4 to 8, wherein the one or more solvents are present in an amount between about 30% to about 90% by weight, more specifically between about 50% to about 85% by weight, and particularly between about 65% to about 80% by weight relative to the total weight of the temporary tattoo ink.

[0154] 10. The temporary tattoo ink according to any one of embodiments 4 to 9, wherein the solvent comprises water and ethanol, more specifically, wherein the ratio between water and ethanol is between about 1:1 and about 1:2, more specifically between about 1:1.3 and about 1:1.8.

[0155] 11. The temporary tattoo ink according to any one of embodiments 6 to 10, wherein the base component is present in an amount between about 0.1% by weight and about 6% by weight, more specifically between about 0.5% by weight and about 4% by weight, and particularly between about 1% by weight and about 3% by weight, relative to the total weight of the temporary tattoo ink.

[0156] 12. An applicator for applying a pattern comprising a semi-permanent colorant, wherein the applicator comprises:

[0157] Carrier liner and adhesive layer,

[0158] and patterns disposed on and / or in the adhesive layer,

[0159] The pattern described herein comprises a semi-permanent colorant and one or more compounds selected from the group consisting of 1,3-butanediol, pentanediol, hexanediol, or mixtures thereof.

[0160] 13. The applicator according to embodiment 12, wherein the carrier pad has a first side and a second side, wherein the adhesive layer is disposed on at least about 50%, more specifically at least 70%, and particularly at least 90% of the second side relative to the total surface area of ​​the second side.

[0161] 14. The applicator according to embodiment 12 or 13, wherein the pattern is disposed on and / or in less than 95%, more specifically less than 90%, and particularly less than 85% of the total surface of the adhesive layer away from the carrier liner.

[0162] 15. The applicator according to any one of embodiments 12 to 14, wherein the adhesive layer comprises a rubber adhesive, is substantially composed of a rubber adhesive, or is composed of a rubber adhesive.

[0163] 16. The applicator according to any one of embodiments 12 to 15, wherein the applicator includes a peeling liner.

[0164] 17. The applicator according to any one of embodiments 12 to 16, wherein the pattern comprises a plurality of spots, wherein the plurality of spots have an average maximum diameter between about 10 µm and about 500 µm, more specifically between about 50 µm and about 250 µm, and particularly between about 75 µm and about 130 µm.

[0165] 18. The applicator according to any one of embodiments 12 to 17, wherein the carrier pad has a thickness between about 10 µm and about 300 µm, more specifically between about 30 µm and about 150 µm, and particularly between about 40 µm and about 100 µm.

[0166] 19. The applicator according to any one of embodiments 12 to 18, wherein the carrier liner comprises a water-resistant polymer or a waterproof polymer, is substantially composed of a water-resistant polymer or a waterproof polymer, or is composed of a water-resistant polymer or a waterproof polymer, particularly a waterproof polymer.

[0167] 20. The applicator according to any one of embodiments 12 to 19, wherein the carrier pad is water-resistant or waterproof.

[0168] 21. The applicator according to any one of embodiments 12 to 20, wherein the adhesive layer comprises a pressure-sensitive adhesive.

[0169] 22. The applicator according to any one of embodiments 12 to 21, wherein the adhesive layer has a thickness between about 5 µm and about 200 µm, more specifically between about 20 µm and about 100 µm, and particularly between about 30 µm and about 80 µm.

[0170] 23. The applicator according to any one of embodiments 12 to 22, wherein the pattern comprising the semi-permanent colorant comprises one or more of the compounds in a weight relative to the total weight of the pattern, ranging from about 0.01 wt% to about 30 wt%, more specifically from about 0.05 wt% to about 25 wt%, and particularly from about 0.1 wt% to about 20 wt%.

[0171] 24. The applicator according to any one of embodiments 12 to 23, wherein the pattern comprises a matrix component, and particularly wherein the matrix component comprises a polyol.

[0172] 25. The applicator according to embodiment 24, wherein the polyol has a molar mass of at least 100 g / mol, more specifically at least 200 g / mol, and particularly at least 300 g / mol. The matrix component can be solid at 0°C, more preferably at 20°C, even more specifically at 30°C, and particularly at 45°C.

[0173] 26. The applicator according to any one of embodiments 12 to 25, wherein the pattern comprising the semi-permanent colorant comprises one or more solvents in a proportion of about 0.01 wt% to about 90 wt% relative to the total weight of the pattern, more specifically between about 0.05 wt% to about 85 wt%, and particularly between about 0.1 wt% to about 80 wt%.

[0174] 27. An applicator obtained by means of:

[0175] Temporary tattoo ink is applied to an adhesive layer disposed on a carrier pad, wherein the temporary tattoo ink comprises:

[0176] One or more semi-permanent colorants,

[0177] One or more compounds selected from the group consisting of 1,3-butanediol, pentanediol, hexanediol, or mixtures thereof.

[0178] 28. The applicator according to embodiment 27, wherein the application of the temporary tattoo ink is performed by printing, particularly inkjet printing.

[0179] 29. The applicator according to embodiment 27 or 28, wherein obtaining the applicator further includes heat treatment, particularly after applying the temporary tattoo ink to the adhesive layer.

[0180] 30. The applicator according to embodiment 29, wherein the heat treatment is performed at a temperature between about 45°C and about 85°C, particularly between about 55°C and about 75°C, for a duration between about 20 minutes and about 120 minutes, particularly between about 30 minutes and about 60 minutes.

[0181] 31. The applicator according to any one of embodiments 27 to 30, wherein obtaining the applicator further includes, particularly after the heat treatment, attaching a release liner to the adhesive layer by lamination.

[0182] 32. The applicator according to any one of embodiments 27 to 31, wherein the temporary tattoo ink comprises:

[0183] One or more solvents ranging from about 30% to about 90% by weight, and / or one or more compounds ranging from about 1% to about 30% by weight, and / or

[0184] One or more of the semi-permanent colorants, ranging from about 1% to about 20% by weight.

[0185] 33. The applicator according to any one of embodiments 27 to 32, wherein the one or more compounds comprise pentanediol.

[0186] 34. The applicator according to any one of embodiments 27 to 33, wherein the adhesive layer comprises a rubber adhesive, is substantially composed of a rubber adhesive, or is composed of a rubber adhesive.

[0187] 35. A method for manufacturing an applicator for applying a pattern comprising a semi-permanent colorant, wherein the method comprises:

[0188] Temporary tattoo ink is applied to an adhesive layer disposed on a carrier pad, wherein the temporary tattoo ink comprises:

[0189] One or more semi-permanent colorants,

[0190] One or more compounds selected from the group consisting of 1,3-butanediol, pentanediol, hexanediol, or mixtures thereof.

[0191] 36. Use of one or more compounds selected from the group consisting of 1,3-butanediol, pentanediol, hexanediol, and mixtures thereof in temporary tattoo inks for preventing or reducing the transfer of printed temporary tattoo inks to a release liner.

Claims

1. A temporary tattoo ink, said temporary tattoo ink comprising: One or more semi-permanent colorants, and One or more compounds selected from the group consisting of 1,3-butanediol, pentanediol, hexanediol, or mixtures thereof.

2. The temporary tattoo ink according to claim 1, wherein one or more compounds comprise pentanediol.

3. The temporary tattoo ink according to any of the preceding claims, wherein the semi-permanent colorant comprises genipin or a genipin derivative, particularly purified genipin.

4. The temporary tattoo ink according to any of the preceding claims, wherein the temporary tattoo ink comprises a matrix component, more specifically, wherein the matrix component is a polyol, more specifically an alcohol containing at least three hydroxyl groups, more specifically a monosaccharide, disaccharide or oligosaccharide, even more specifically a disaccharide, and particularly trehalose.

5. The temporary tattoo ink according to any of the preceding claims, wherein the one or more compounds are present in an amount between about 1% to about 30% by weight, more specifically between about 5% to about 25% by weight, and particularly between about 10% to about 20% by weight relative to the total weight of the temporary tattoo ink.

6. The temporary tattoo ink according to any of the preceding claims, wherein the temporary tattoo ink comprises a surfactant, more specifically, wherein the surfactant is a diol, and particularly 1,2-hexanediol.

7. An applicator for applying a pattern comprising a semi-permanent colorant, wherein the applicator comprises: Carrier liner and adhesive layer, and patterns disposed on and / or in the adhesive layer, The pattern described herein comprises a semi-permanent colorant and one or more compounds selected from the group consisting of 1,3-butanediol, pentanediol, hexanediol, or mixtures thereof.

8. The applicator of claim 7, wherein the carrier pad has a first side and a second side, wherein the adhesive layer is disposed on at least about 50%, more specifically at least 70%, and particularly at least 90% of the second side relative to the total surface area of ​​the second side.

9. The applicator according to claim 7 or 8, wherein the pattern is disposed on and / or in less than 95%, more specifically less than 90%, and particularly less than 85% of the total surface area of ​​the adhesive layer away from the carrier pad.

10. The applicator according to any one of claims 7 to 9, wherein the applicator includes a peeling liner.

11. The applicator according to any one of claims 7 to 10, wherein the one or more compounds comprise pentanediol.

12. The applicator according to any one of claims 7 to 11, wherein the pattern comprises a matrix component, more specifically, wherein the matrix component is a polyol, more specifically an alcohol containing at least three hydroxyl groups, more specifically a monosaccharide, disaccharide or oligosaccharide, even more specifically a disaccharide, and particularly trehalose.

13. The applicator according to any one of claims 7 to 12, wherein the pattern comprises a surfactant, more specifically, wherein the surfactant is a diol, and particularly 1,2-hexanediol.

14. An applicator, said applicator being obtained by: Temporary tattoo ink is applied to an adhesive layer disposed on a carrier pad, wherein the temporary tattoo ink comprises: One or more semi-permanent colorants, One or more compounds selected from the group consisting of 1,3-butanediol, pentanediol, hexanediol, or mixtures thereof.

15. The applicator of claim 14, wherein the application of the temporary tattoo ink is performed by printing, particularly inkjet printing.

16. The applicator according to claim 14 or 15, wherein the pattern comprises a plurality of spots, wherein the plurality of spots have an average maximum diameter between about 10 µm and about 500 µm, more specifically between about 50 µm and about 250 µm, and particularly between about 75 µm and about 130 µm.

17. The applicator according to any one of claims 14 to 16, wherein the temporary tattoo ink comprises: One or more volatile solvents, ranging from about 30% to about 90% by weight, and / or One or more of the compounds, ranging from about 1% to about 30% by weight, and / or One or more of the semi-permanent colorants, ranging from about 1% to about 20% by weight.

18. The applicator according to any one of claims 14 to 17, wherein the one or more compounds comprise pentanediol.

19. The applicator according to any one of claims 14 to 18, wherein the pattern comprises a matrix component, more specifically, wherein the matrix component is a polyol, more specifically an alcohol containing at least three hydroxyl groups, more specifically a monosaccharide, disaccharide or oligosaccharide, even more specifically a disaccharide, and particularly trehalose.

20. The applicator according to any one of claims 14 to 19, wherein the pattern comprises a surfactant, more specifically, wherein the surfactant is a diol, and particularly 1,2-hexanediol.

21. A method for manufacturing an applicator for applying a pattern comprising a semi-permanent colorant, wherein the method comprises: Temporary tattoo ink is applied to an adhesive layer disposed on a carrier pad, wherein the temporary tattoo ink comprises: One or more semi-permanent colorants, One or more compounds selected from the group consisting of 1,3-butanediol, pentanediol, hexanediol, or mixtures thereof.

22. The method of claim 21, wherein one or more compounds comprise pentanediol.

23. Use of one or more compounds selected from the group consisting of 1,3-butanediol, pentanediol, hexanediol, and mixtures thereof in temporary tattoo inks for preventing or reducing the transfer of printed temporary tattoo inks to a release liner.

24. The use according to claim 23, wherein one or more of the compounds comprise pentanediol.

Images