Thickened Bleaching Agent for Multi-Tonal Hair Coloring
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Solution Overview
Problem
Current hair coloring methods require a time-consuming second step for achieving multitonal effects, as natural color nuances are often completely covered, making it difficult to achieve a natural appearance with highlights in a single coloring process, especially in home use.
Innovation Solution
A method involving a pre-treatment step with a thickened bleaching agent containing an oxidizing agent, such as hydrogen peroxide, applied to specific hair strands or areas to create a multitonal effect in a single coloring step, allowing for immediate visible results after rinsing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a standard oxidation coloring process is used to achieve permanent color, then excellent long-lasting coloring results are obtained, but natural color nuances are completely covered and multitonal colorations become difficult to achieve
Solution Approach 1:
The patent applies different concentrations of oxidizing agent to different sections of hair - higher concentration to create highlights and lower concentration to maintain natural color in other areas. This local variation in treatment intensity enables multitonal coloring while preserving the reliability of permanent oxidation coloring in the treated sections.
Solution Approach 2:
The patent divides the hair into different sections (highlights and non-highlights) and applies different treatment protocols to each segment. By segmenting the hair and applying selective oxidation treatment, the process achieves both permanent coloring in treated areas and natural appearance in untreated areas, resolving the contradiction between coloring reliability and multitonal capability.
2Adaptability or versatility
If a two-step process is used with first coloring then second decolorizing step, then natural appearance with highlights is achieved, but the process becomes time-consuming and frustrating
Solution Approach 1:
The patent merges the coloring and highlighting functions into a single simultaneous process. By applying the oxidizing agent mixture to the entire hair shaft in one step, with varying concentrations in different sections, the process combines what were previously separate sequential operations (first coloring, then decolorizing) into one integrated treatment, thereby reducing time while maintaining natural appearance.
Solution Approach 2:
The patent performs preliminary application of the oxidizing agent mixture to all hair sections before the actual coloring reaction occurs. This preliminary preparation allows the highlights to be formed simultaneously with the base color deposition, eliminating the need for a separate second step and reducing overall process time while achieving the desired natural appearance.
3Adaptability or versatility
If oxidizing agent is applied with brush and aluminum foil protection, then targeted bleaching of specific sections is achieved, but the process complexity and time requirement increase
Solution Approach 1:
The patent uses a single application tool (brush or sponge) to perform multiple functions: applying the oxidizing agent mixture to both the entire hair shaft and specifically to highlight sections. By making the application tool multi-functional and eliminating the need for separate aluminum foil protection steps, the process achieves targeted highlights creation while reducing device complexity and procedural steps.
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
Enables the creation of natural-looking multitonal hair color with highlights in a single step, reducing the time and effort required for hair coloring, providing a more efficient and satisfying coloring process.
Implementation Method 1
the dyes coloring the substrate are usually decolorized by oxidation using appropriate oxidizing agents such as hydrogen peroxide
Implementation Method 2
a thickened bleaching agent is used in combination with an oxidative coloring agent
Data Source
AI summary
The invention relates to a method for dyeing keratin fibres, in particular human hair, in which after applying and allowing a thickened pre-treatment agent in the form of a lightening or bleaching agent (M1), comprising at least one oxidation agent, to react, a dye (M2) is applied directly and is allowed to react without rinsing. By carrying out said method, hair can be coloured in a dyeing step and simultaneously multi-tonal dyeing with highlights is achieved.