Partial Hair Dyeing Method Using Segmented Tying and Temperature Control
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Solution Overview
Problem
Existing hair dyeing methods face difficulties in accurately coloring thin hair materials, such as human and synthetic hair, to achieve desired color variations and tones, particularly in applying different colors to specific portions of a single strand, due to complex processes and limited control over dye application.
Innovation Solution
A hair dyeing method involving applying a first dye, dividing hair into units, marking and tying sections to be excluded, heating a dyeing apparatus with water and chemicals, and gradually raising temperature to achieve the desired color, allowing for precise partial coloring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a dipping method is used to color hair, then the process is simple, but it is difficult to accurately control the portion of hair to be colored and requires complex procedures to prevent inadvertent dyeing
Solution Approach 1:
The patent applies preliminary action by pre-tying the hair section that should not be dyed with a tying material before the dyeing process. This preliminary step establishes clear boundaries and prevents the need for complex control procedures during dyeing, allowing the hair to be simply dipped in dye while maintaining accurate coloring control.
2Adaptability or versatility
If multiple colors are applied to different portions of hair, then color variety is achieved, but the number of steps increases and control becomes difficult
Solution Approach 1:
The patent applies segmentation by dividing the hair into multiple sections and tying each section that should not be dyed with different tying materials. This allows different portions of hair to be selectively colored with different dyes simultaneously, achieving color variety while maintaining simple dipping operations without increasing process complexity.
Solution Approach 2:
The patent applies local quality by using different tying materials with distinct properties (water-soluble vs. non-water-soluble) for different hair sections. This enables different local regions of the hair to have different properties, allowing selective dyeing with multiple colors while keeping the overall process simple and controlled.
3Manufacturing precision
If thin hair material is dyed, then desired appearance can be achieved, but the hair easily loses color or discolors when exposed to sunlight or washed
Solution Approach 1:
The patent applies parameter changes by utilizing the solubility parameter of different tying materials in water. By selecting tying materials with different water solubility characteristics, the patent enables controlled dye penetration into thin hair while preventing excessive dye uptake that would cause discoloration or fading, thus improving color fastness while maintaining appearance quality.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method enables simple and precise partial hair dyeing, allowing for designated color application on specific parts of hair, improving control and reducing the complexity of the dyeing process compared to existing methods.
Implementation Method 1
heating the water which is injected into the dyeing apparatus
Data Source
AI summary
Provided are a hair dyeing method which causes a particular portion of hair to attain a different color than the overall color, and hair which is thus manufactured. The method includes steps of (a) applying a first dye to a plurality of hairs, (b) dividing the plurality of hairs, to which the first dye is applied, into specific units of hair, (c) marking a section in the specific unit of hair which will not be dyed, (d) tying the marked section in the specific unit of hair, (e) injecting water into a dyeing apparatus which is to be used in applying a second dye, (f) heating the water which is injected into the dyeing apparatus, (g) injecting a chemical and a dye into the water which is injected into the dyeing apparatus and heated, (h) introducing the specific unit of hair to be mixed with the water which is injected into the dyeing apparatus, (i) gradually raising a temperature of the water which is injected into the dyeing apparatus, (j) when the temperature of the water which is injected into the dyeing apparatus rises to a certain temperature, maintaining the temperature of the water for a certain duration of time, (k) verifying the color of the specific unit of hair, and repeating the step (g) when the color of the specific unit of hair is not a designated color, and (l) when the color of the specific unit of hair is the designated color, stopping the heating of the water which is injected into the dyeing apparatus, and draining the water from the dyeing apparatus.