Color Cosmetic with Interference Pigments for Skin Tone Adaptation
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Solution Overview
Problem
Existing color cosmetics struggle to optimally match and enhance a wide range of skin tones and undertones, leading to uncertainty in finding the right shade, especially with lighter coverage products and those containing effect pigments, where the resulting color on the skin differs from the mass tone.
Innovation Solution
A cosmetic formulation incorporating red and gold interference pigments, combined with unfermented green rooibos extract, boron nitride powder, zinc oxide, bisabolol, and lauroyl lysine coated mica, which adapts to various skin tones and undertones, providing superior tone stability and adaptability, and enhancing color and textural effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If effect pigments are incorporated to enhance coloristic effects, then the cosmetic provides contrasting effects and enhanced appearance, but the resulting color on the skin differs from the mass tone, creating uncertainty in shade matching
Solution Approach 1:
The patent applies color changes by incorporating effect pigments that alter the optical properties of the cosmetic. Specifically, it uses interference pigments with specific refractive indexes (first interference pigment with refractive index 1.4-1.6, second interference pigment with refractive index 1.6-1.8) to create color effects that adapt to different skin tones, transforming the cosmetic's appearance based on the underlying skin color.
Solution Approach 2:
The patent changes physical parameters by carefully controlling the particle size distribution of different pigments. It specifies that the first interference pigment has a mean particle size of 0.1-10 μm and the second interference pigment has a mean particle size of 10-50 μm. This parameter control ensures optimal light interaction and color adaptation across different skin tones.
2Quantity of substance
If the cosmetic is formulated to be transparent for lighter coverage, then it allows skin tone to show through, but the resulting color on the skin is not the same as the mass tone, increasing matching uncertainty
Solution Approach 1:
The patent uses composite materials by combining multiple types of pigments with specific optical properties. It formulates a composite system including first interference pigment (0.1-10 μm, refractive index 1.4-1.6), second interference pigment (10-50 μm, refractive index 1.6-1.8), and optional third pigment (50-200 μm, refractive index 1.6-2.0). This composite structure creates a cosmetic that adapts its color to match various skin tones while maintaining the desired coverage level.
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 formulation effectively covers a wide spectrum of skin tones, reducing the risk of applying the wrong color and offering enhanced optical performance and textural benefits, suitable for use as a foundation, concealer, or finishing powder.
Implementation Method 1
red and gold interference pigments
Implementation Method 2
interference pigments with a refractive index of from about 1.4 to about 1.6 for the first interference pigment and from about 1.6 to about 1.8 for the second interference pigment
Data Source
AI summary
A foundation having a shade which covers a wide spectrum of different skin tones and undertones, comprises red and gold interference pigments, which provide a formula that is adaptable to both red and yellow skin undertones. The composition virtually eliminates the risk of application of the wrong foundation color, and provides enhanced color and textural effects, and superior optical performance.