Oxidation Dye Substrate with Preservatives for Keratin Fibers
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Solution Overview
Problem
Standard oxidation dyeing processes for keratin fibers are inadequate in achieving precise, novel visual results and are prone to errors, staining, and space occupation issues, with dyeing power decreasing over time due to atmospheric oxygen exposure.
Innovation Solution
A process involving a substrate coated with oxidation dyes, thiolated reducing agents, and organic reducing agents of the reductone type, applied with an oxidizing aqueous composition, which maintains dyeing power and allows for precise, intense colorations and patterns even after weeks of preparation, reducing staining and storage needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a substrate pretreated with oxidation dyes and oxidizing composition is used for dyeing, then unified colorings and colored patterns can be obtained, but the dyeing power greatly decreases in a few days due to atmospheric oxygen
Solution Approach 1:
The patent separates the oxidizing agent from the substrate, storing only the oxidation dyes and couplers on the substrate while keeping the oxidizing composition separate. This extraction prevents premature oxidation by atmospheric oxygen, maintaining dyeing power while preserving the ability to produce precise colorings and patterns when the oxidizing composition is applied at the time of use.
Solution Approach 2:
The substrate is pretreated with oxidation dyes and couplers in advance, but the actual oxidation reaction is postponed until the moment of application when the oxidizing composition is added. This preliminary preparation allows the substrate to be ready for precise pattern transfer while delaying the chemical reaction that would otherwise degrade the dyes during storage.
2Reliability
If standard oxidation dyeing processes are used, then permanent and vivid colorings can be obtained, but it is difficult to obtain precise colored patterns and novel optical effects
Solution Approach 1:
The patent divides the dyeing system into distinct functional components: the substrate containing specific oxidation dyes and couplers positioned for precise pattern formation, and a separate oxidizing composition. This segmentation allows independent optimization of pattern precision (through substrate design) and coloring permanence (through controlled oxidation at application time).
Solution Approach 2:
The substrate acts as an intermediary carrier that holds the dye components in precise spatial arrangements before the oxidation reaction occurs. This intermediary structure enables precise pattern transfer to the hair while the subsequent oxidation with the separate composition ensures permanent and vivid coloring.
3Adaptability or versatility
If dye compositions and oxidizing compositions are stored for later use, then various colors can be achieved, but space occupation problems arise in hairstyling salons
Solution Approach 1:
The patent segments the dyeing system into a compact substrate containing multiple dye components and a separate oxidizing composition. This segmentation allows the substrate to be stored in a compact form with long shelf life, while the oxidizing composition is applied fresh, reducing overall storage space requirements while maintaining color variety through different substrate formulations.
Solution Approach 2:
The substrate is designed as a stable, long-lasting component that can be stored without degradation, replacing the need to store large quantities of mixed dye compositions. The oxidizing composition is applied fresh at each use, creating a system where the bulk of storage is occupied by stable, space-efficient substrates rather than large volumes of reactive dye mixtures.
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 process enables the production of vivid, resistant color patterns with improved precision and reduced risk of errors and staining, while maintaining dyeing power over time and optimizing storage space.
Implementation Method 1
one or more oxidation dyes... one or more oxidizing agents... The oxidation dyes present on the surface of the substrate dissolve and react with the oxidizing agent
Implementation Method 2
one or more thiolated reducing agents and one or more organic reducing agents of reductone type... preserving said substrates... retaining a potent dyeing power
Data Source
AI summary
Oxidation dyeing process using a substrate bearing at least one oxidation dye, several preservatives and an oxidizing aqueous composition The present invention relates to a process for the oxidation dyeing of keratin fibres, in particular human keratin fibres such as the hair, comprising a step of application, to said keratin fibres, i) of a substrate comprising on its surface one or more oxidation dyes, one or more thiolated reducing agents and one or more organic reducing agents of reductone type, and a step of application, to said keratin fibres, ii) of an oxidizing aqueous composition comprising one or more oxidizing agents. The present invention also relates to a process for preparing said substrate. The invention also relates to an element in sheet form, pretreated by a composition comprising one or more oxidation dyes, one or more thiolated reducing agents, and one or more organic reducing agents of reductone type.