Keratin Fibre Bleaching Composition for One-Step Dye Stability
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Solution Overview
Problem
Existing methods for bleaching and dyeing keratin fibers, particularly dark hair, are inefficient, lengthy, and degrade the quality of the fibers, often requiring multiple steps and resulting in undesirable orange-yellow tints when using peroxygenated salts and oxidation dyes.
Innovation Solution
A composition comprising hydrogen peroxide, carbonates or bicarbonates, silicates, and oxidation dyes, applied in a single step, stabilizes the dyes and achieves effective lightening and coloring, minimizing fiber degradation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If peroxygenated salts and oxidation dyes are used together, then lightening performance is improved, but chemical compatibility is lost and orange-yellow tints appear
Solution Approach 1:
The patent introduces a specific chemical system comprising hydrogen peroxide as the oxidizing agent, carbonate or bicarbonate as buffering agents, and silicate as a stabilizing agent. This intermediary chemical environment allows oxidation dyes and lightening agents to coexist without adverse reactions, preventing orange-yellow tint formation while maintaining effective lightening performance on dark hair.
2Manufacturing precision
If bleaching and dyeing are performed in separate steps, then color precision is improved, but processing time and fiber degradation increase
Solution Approach 1:
The patent merges the bleaching and dyeing operations into a single simultaneous process. The composition contains both lightening agents (hydrogen peroxide) and oxidation dyes that work together in one application step, eliminating the need for separate bleaching and dyeing steps while maintaining color precision and reducing processing time and fiber degradation.
Solution Approach 2:
The compositional system achieves multi-functionality by incorporating agents that simultaneously perform lightening and dyeing functions. The hydrogen peroxide system provides lightening while the oxidation dyes provide coloring, and the carbonate/bicarbonate-silicate buffer system ensures both processes occur compatibly in a single step, making the composition universally effective for both functions.
3Use of energy by moving object
If multiple lightening steps are applied, then lightening performance is improved, but fiber quality degradation increases
Solution Approach 1:
The patent optimizes the chemical parameters of the lightening system by using hydrogen peroxide at controlled concentrations combined with carbonate or bicarbonate buffering agents and silicate stabilizers. This parameter optimization allows effective lightening performance on dark hair while the buffered environment protects fiber quality, avoiding the cumulative degradation associated with multiple aggressive lightening 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
The composition allows for simultaneous bleaching and dyeing in a single step, achieving pastel or chromatic colors with improved fiber quality by stabilizing the oxidation dyes and optimizing lightening performance.
Implementation Method 1
comprising at least one chemical oxidizing agent chosen from hydrogen peroxide, hydrogen peroxide-generating systems other than peroxygenated salts
Implementation Method 2
comprising at least one oxidation dye
Data Source
AI summary
The present invention relates to a composition for the simultaneous bleaching and dyeing of keratin fibres, comprising at least one chemical oxidizing agent, at least one (bi)carbonate, at least one silicate and at least one oxidation dye, and also to a process for the simultaneous bleaching and dyeing of keratin fibres using this composition.