Leather ink shading method
By constructing a multi-layer liquid system on leather and using an interface modifier, the problems of three-dimensional effect and precision control in traditional leather dyeing methods have been solved, achieving a highly efficient and material-saving three-dimensional artistic effect.
Patent Information
- Application Number
- CN202511661707.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-13
- Publication Date
- 2026-01-09
AI Technical Summary
Traditional leather dyeing methods struggle to achieve multi-layered, three-dimensional effects, and the lack of high-precision control in shallow liquid systems that save materials leads to unstable pattern processing and material waste.
A multi-layer liquid system is adopted, including a first coloring liquid layer, an oily isolation liquid layer and a second coloring liquid layer, and an interface modifier layer can be selected. Three-dimensional patterns are formed on leather through interface regulation, and polar solvents such as alcohols or ketones are used to improve interface stability and control effect.
It enables high-precision control of three-dimensional pattern formation in shallow liquid systems, improving operational controllability and material utilization, and creating artistic effects with variations in reality and spatial depth.
Smart Images
Figure CN121295530A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of leather surface treatment technology, specifically relating to a surface treatment method that forms an artistic ink-painting-like diffusion effect on leather by actively constructing and controlling an unstable fluid interface. Background Technology
[0002] In the field of leather decoration, traditional techniques such as immersion dyeing and tie-dyeing are difficult to achieve the natural flow and multi-layered layering of colors.
[0003] Marbling, as a surface decoration technique, is traditionally carried out in a deep bath, which has the following inherent drawbacks: First, the patterns formed are often presented as two-dimensional planes on a macroscopic level. Even if clear color separation can be achieved, they often appear stiff and rigid due to the simple superposition between liquid layers, lacking the three-dimensionality and artistic conception of "the interplay of emptiness and fullness" and "the balance of light and dark" in Chinese ink painting.
[0004] Secondly, in order to maintain the stability of the liquid surface and the pattern operation time, traditional processes usually require a large amount of base liquid. This not only wastes materials, but also weakens the precise control of interfacial tension due to the excessively thick liquid layer. As a result, the operator's control over the final pattern shape decreases, making it difficult to achieve a fine gradient from the clear boundary of "solid" to the soft shading of "virtual".
[0005] Therefore, there is an urgent need in this field for a leather dyeing method that can overcome the above-mentioned defects, achieve multi-layered, three-dimensional effects with virtual and real variations, and achieve high-precision control in a shallow liquid layer system that saves materials. Summary of the Invention
[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide a method for ink-washing leather based on interface control.
[0007] To achieve the above objectives, the present invention adopts the following technical solution: A method for ink wash painting on leather based on interface control includes the following steps: S1. Provide a liquid tank and construct a first coloring liquid layer therein; S2. Construct an oily isolation liquid layer on the first coloring liquid layer; S3. Construct a second coloring liquid layer on the oily isolation liquid layer; S4. The vegetable-tanned leather is laid on the multi-layer interface system formed by steps S1 to S3 and then transferred and dyed. S5. Remove the dyed leather, clean off excess dye, and shape the leather while it is still damp, according to the dyeing effect. Design three-dimensional shapes based on different dyeing effects. Figure 5After shaping, place it in a naturally ventilated place to air dry. Once dry, apply a bright color fixing agent. In any stage after step S1 and before step S4, an interface modifier layer may be introduced selectively or in combination; the interface modifier layer is a liquid medium that can change the interfacial tension of its underlying liquid layer.
[0008] The interface modifier layer is preferably a polar solvent, such as alcohols, ketones, or aqueous solutions thereof. The core function of the "oil-based isolation liquid layer" described in this invention is its ability to form an immiscible and stable physical isolation interface with the aqueous coloring liquid layer. Any liquid medium that satisfies this function falls within the scope of protection of this invention. This includes, but is not limited to, various mineral oils (such as white mineral oil), synthetic oils (such as silicone oil), vegetable oils (such as castor oil), and mixtures thereof. Those skilled in the art will recognize that oils with different viscosities and surface tensions will produce slightly different isolation and diffusion effects, which reflects the adjustability and versatility of the method of this invention. Selecting suitable oils through conventional experiments to achieve specific artistic effects falls within the scope of this invention.
[0009] Compared with the prior art, the beneficial effects of the present invention are as follows.
[0010] 1. Breakthrough in artistic effect: Through the precise superposition of multiple layers of coloring liquid and functional liquid, a three-dimensional pattern with changes in reality and space depth is created on the leather, realizing a leap from "rigid color block separation" to "dynamic and blurred artistic conception".
[0011] 2. Innovation in process control: The shallow liquid layer (1-20mm) system is adopted, and the liquid layer depth is determined according to different design effects. This greatly reduces the amount of base liquid used, while strengthening the dominant role of interfacial tension in pattern formation. This allows operators to more precisely control the boundaries, mixing and transition of colors, and improves the controllability and reproducibility of the process.
[0012] 3. Systematic nature of the technology: This invention organically combines "shallow liquid layer", "oil-based isolation", "interface modification" and "multi-layer superposition" to construct a complete method system with a broad scope of protection. Attached Figure Description
[0013] Figure 1 Example 1: Schematic diagram of the leather effect with clear boundaries.
[0014] Figure 2 : Schematic diagram of the leather effect after physical disturbance obtained in Example 2.
[0015] Figure 3 Example 3: Schematic diagram of the leather effect after treatment with interface modifier.
[0016] Figure 4Leather effect diagrams of the non-oil-repellent release agent and interface modifier obtained by comparison.
[0017] Figure 5 The functional illustration shows a leather sculpture that has been shaped and fixed in color after being dyed and its humidity adjusted. Detailed Implementation
[0018] The present invention will be described in detail below with reference to the embodiments. These embodiments are for illustrative purposes only and do not constitute a limitation on the scope of protection.
[0019] Example 1: Basic isolation effect ( Figure 1 ).
[0020] 1. Clean the vegetable-tanned cowhide and set aside.
[0021] 2. Pour yellow water-based dye (S1) into a flat-bottomed container.
[0022] 3. Slowly inject white mineral oil as an oily isolation layer (S2).
[0023] 4. Add red water-based dye (S3) to the oil layer.
[0024] 5. Leather transfer printing (S4).
[0025] 6. Remove the leather, shape it, air dry it, and fix the color (S5).
[0026] Effect: Gain Figure 1 The leather shown is clearly red and yellow.
[0027] Example 2: Application of physical disturbance ( Figure 2 ).
[0028] 1. Repeat steps 1-4 of Example 1.
[0029] 2. Use the tip of a cone to stroke the liquid surface to create physical disturbance.
[0030] 3. Subsequent leather transfer and post-processing.
[0031] Effect: Gain Figure 2 The leather shown is interwoven with colors.
[0032] Example 3: Application of interface modifiers ( Figure 3 ).
[0033] 1. Repeat steps 1-4 of Example 1 to construct the "yellow-oil-red" system.
[0034] 2. Add ethanol dropwise to the red liquid layer area as an interface modifier layer.
[0035] 3. Subsequent leather transfer and post-processing.
[0036] Effect: Gain Figure 3 The leather shown has a color diffusion texture.
[0037] Comparative example ( Figure 4 ).
[0038] Without adding an oily isolation liquid layer and interface modifier, red and yellow dyes are directly superimposed.
[0039] Result: The colors are mixed and muddy, without clear layers or blurring.
[0040] Although the present invention has been described in detail through the foregoing embodiments, it will be understood by those skilled in the art that various changes, modifications, or variations can be made to these embodiments without departing from the spirit and scope of the invention. The scope of the patent right of the present invention should be defined by the appended claims and their legal equivalents.
Claims
1. A method for ink wash painting on leather based on interface control, characterized in that, Includes the following steps: S1. Provide a liquid tank and construct a first coloring liquid layer therein; S2. Construct an oily isolation liquid layer on the first coloring liquid layer; S3. Construct a second coloring liquid layer on the oily isolation liquid layer; S4. The vegetable-tanned leather is laid on the multi-layer interface system formed by steps S1 to S3 and then transferred and dyed. S5. Remove the dyed leather and perform post-treatment; In any stage after step S1 and before step S4, an interface modifier layer may be introduced selectively or in combination; the interface modifier layer is a liquid medium that can change the interfacial tension of its underlying liquid layer.
2. The method according to claim 1, characterized in that, The interface modifier layer is a polar solvent.
3. The method according to claim 2, characterized in that, The polar solvent is one or more of alcohols, ketones, or aqueous solutions.
4. The method according to claim 1, characterized in that, The oily isolation liquid layer is an oily liquid medium that does not freely mix with the coloring liquid layer.
5. The method according to claim 4, characterized in that, The oily isolation liquid layer is a liquid medium that can fulfill this function, including but not limited to various mineral oils (such as white mineral oil), synthetic oils (such as silicone oil), vegetable oils (such as castor oil), and mixtures thereof.
6. The method according to claim 1, characterized in that, The first coloring liquid layer and / or the second coloring liquid layer are water-based dye layers, oil-based dye layers, or alcohol-based dye layers.
7. The method according to claim 1, characterized in that, After step S3 and before step S4, repeat steps S2 and S3 once or more.
8. The method according to claim 1, characterized in that, Before or during step S4, a physical disturbance is applied to the multi-layer interface system.
9. The method according to claim 1, characterized in that, The post-processing in step S5 includes: shaping and drying the dyed leather, and applying a color-fixing agent and a hardening agent to fix the gloss of the dried leather.