Coated Colouring Solid Particles for Hair Dye Customization
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Solution Overview
Problem
Current oxidation dye compositions for keratin fibers, such as hair, offer limited customization options and are not effective in providing desired shades, especially considering individual hair conditions and pre-existing shades, leading to inconsistent results.
Innovation Solution
Development of coloring solid particles with a core containing direct dyes and/or oxidation dye precursors, coated with cellulose ethers, allowing for precise customization of dye compositions and improved color retention against environmental factors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If predefined dye compositions are used, then manufacturing simplicity is maintained, but customization capability and color precision are limited
Solution Approach 1:
The patent divides the dye composition into separate solid particles, each containing specific dyes and cellulose ethers. These particles can be individually selected and combined to create customized dye compositions, allowing flexibility in shade selection while maintaining simple manufacturing of individual particle types.
Solution Approach 2:
The patent enables customization by varying the types and amounts of dyes within the solid particles, as well as adjusting cellulose ether content. This allows precise control over color properties and performance characteristics without complicating the fundamental particle structure or manufacturing process.
2Adaptability or versatility
If oxidation dye precursors are used, then color variety is achieved, but consistency and reproducibility are compromised
Solution Approach 1:
The patent applies different dye combinations and cellulose ether contents to different solid particles based on their intended function. Each particle type is optimized for specific color outcomes and performance requirements, ensuring consistency within each particle category while providing variety across the product line.
Solution Approach 2:
The patent pre-formulates solid particles with specific dye combinations and cellulose ether contents during manufacturing. This preliminary preparation ensures that each particle type delivers consistent, reproducible results when used, eliminating variability introduced during final dye composition mixing.
3Reliability
If cellulose ethers are added to coating layer, then color retention and resistance to external factors are improved, but manufacturing complexity increases
Solution Approach 1:
The patent uses a thin coating layer containing cellulose ethers on the surface of each solid particle. This thin film provides protection and improves color retention against washing, perspiration, and light, while adding minimal complexity to the manufacturing process through standard coating techniques.
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 personalized and intense coloration with good build-up and resistance to washing, perspiration, and light, while ensuring reproducible results and easy dissolution in aqueous compositions.
Implementation Method 1
an upper coating layer covering said core, and containing one or more cellulose ethers
Implementation Method 2
when combined with oxidizing products, are able to produce coloured compounds by a process of oxidative condensation
Data Source
AI summary
The present application relates to a colouring solid particle for dyeing keratin fibres, in particular human keratin fibres such as the hair, comprising a core containing one or more direct dyes and/or one or more oxidation dye precursors and an upper coating layer covering said core and containing one or more cellulose ethers. The present application also relates to a process for preparing a dye composition comprising one or more colouring solid particles, to a process for the oxidation dyeing of keratin fibres, comprising the application of the composition obtained to said fibres, and to the use of this composition for dyeing keratin fibres.