Self-foaming Hair Dye Device with Segmented Compartments
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Solution Overview
Problem
Current hair dyeing methods, particularly those using oxidation dyes, face challenges in maintaining homogeneous coloration over time, especially in concealing white hairs and maintaining color intensity at the roots and lengths, due to difficulties in applying dye compositions effectively and achieving uniform coverage.
Innovation Solution
A multi-compartment device or kit containing a first compartment with a dyeing composition comprising oxidation dyes and alkaline agents, and a second compartment with oxidizing agents, including self-foaming agents that expand upon application, forming a ready-for-use self-foaming dyeing composition for easy and uniform application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If oxidation dyeing compositions are applied to maintain coloration, then color intensity is improved, but application precision deteriorates making it difficult to target specific areas
Solution Approach 1:
The device segments the dyeing composition into two separate compartments: compartment (A) containing oxidation dyes and alkaline agents, and compartment (B) containing oxidizing agents. These compartments are mixed immediately before application, allowing the active dyeing components to be transported separately and combined at the point of use, thereby improving application precision while maintaining color intensity.
Solution Approach 2:
The patent introduces an intermediary mixing mechanism within the applicator device that combines compartments (A) and (B) immediately before application to the hair. This intermediary mixing ensures that the oxidation dyes and oxidizing agents are combined only when needed, allowing for precise targeting of specific hair areas while preserving the full color intensity of the complete composition.
2Stability of the object's composition
If dye composition is applied to roots and lengths separately, then color uniformity is improved, but treatment time increases
Solution Approach 1:
The dyeing composition in the device is designed with multi-functionality, containing both oxidation dyes and oxidizing agents in separate compartments that can be mixed and applied to different hair sections (roots, lengths, ends) with a single application process. This universal composition maintains color uniformity across all hair sections while reducing the need for multiple separate treatments, thereby decreasing overall treatment time.
3Ease of operation
If foam-based dyeing composition is used, then application ease is improved, but coverage precision deteriorates
Solution Approach 1:
The device employs a dynamic foam generation system where the foam is produced immediately before application by mixing compartments (A) and (B) within the applicator. This dynamic foam generation allows the composition to maintain a controlled foam structure that is easy to apply while preserving coverage precision, as the foam expands and distributes the dyeing agents uniformly only when and where needed.
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 self-foaming dyeing composition facilitates easy application to all hair sections without the need for precise targeting, ensuring strong, uniform coloration and easier maintenance, reducing the visibility of roots and fading at the ends.
Implementation Method 1
one or more self-foaming agents present in at least one of the said compositions (A) and/or (B)
Implementation Method 2
oxidation bases, which, in combination with oxidizing products, can give rise to coloured compounds by an oxidative condensation process
Data Source
AI summary
The present invention relates to a multi-compartment device or kit for dyeing keratinous fibers, in particular human keratinous fibers, such as the hair, comprising a first compartment including a dyeing composition (A) comprising one or more oxidation dyes and one or more alkaline agents and a second compartment including a composition (B) comprising one or more oxidizing agents; the said device also comprising one or more self-foaming agents having a boiling point of at least 1° C. present in at least one of the compositions (A) and/or (B). The invention also relates to a ready-for-use self-foaming dyeing composition and to a method for dyeing keratinous fibers employing this composition.