Interference Pigment Transparent Metal Layer Light Absorption
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Solution Overview
Problem
Conventional interference pigments struggle to develop vivid interference colors on light-colored bases due to light interference cancellation by the base color, particularly when the substrate is transparent and has high transmittance, such as glass.
Innovation Solution
An interference pigment comprising a flaky inorganic substrate coated with a transparent metal layer and a metal oxide layer, where the transparent metal layer is positioned between the inorganic substrate and the metal oxide layer, moderates light absorption and enhances light interference, allowing for vivid color development on light-colored bases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a transparent substrate with high transmittance (e.g., glass) is used, then transparency is improved, but interference colors become less visible on light-colored bases
Solution Approach 1:
A transparent metal layer is introduced as an intermediary between the transparent substrate and the metal oxide layer. This intermediate layer absorbs excess light reflected from the base, preventing it from canceling out the interference colors. The metal layer acts as a mediator that selectively absorbs certain wavelengths while allowing others to pass through, thereby enhancing the visibility of interference colors on light-colored bases without compromising the transparency of the overall structure.
Solution Approach 2:
The invention uses a composite structure consisting of multiple layers with different optical properties: a transparent substrate, a transparent metal layer, and a metal oxide layer. Each layer contributes different characteristics - the substrate provides transparency, the metal layer provides selective light absorption, and the metal oxide layer produces interference colors. This composite approach allows the system to simultaneously achieve high transparency and vivid interference color display.
2Device complexity
If conventional interference pigments are used on light-colored bases, then simplicity is maintained, but interference colors are canceled by base color reflection
Solution Approach 1:
The transparent metal layer serves as an intermediary that absorbs light reflected from the light-colored base, preventing this reflected light from canceling out the interference colors. By introducing this intermediate absorbing layer, the system maintains its relatively simple structure while significantly enhancing the intensity and visibility of interference colors on light-colored bases.
3Illumination intensity
If a transparent metal layer is added between the substrate and metal oxide layer, then interference color visibility is improved, but manufacturing complexity increases
Solution Approach 1:
The invention optimizes the thickness and optical properties of the transparent metal layer to achieve the desired light absorption effect. By carefully controlling the parameters of the intermediate layer (such as thickness, material composition, and optical density), the system enhances interference color visibility while minimizing the increase in manufacturing complexity. The parameter optimization ensures that the additional layer adds functional value without excessive complexity.
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 described interference pigment achieves vivid interference colors on both light and dark bases by absorbing part of the light reflected from the base, thereby reducing interference cancellation and producing more intense and pale color tones, suitable for cosmetics, paints, and resin compositions.
Implementation Method 1
the transparent metal layer moderates light absorption and enhances light interference, allowing for vivid color development on light-colored bases
Implementation Method 2
a transparent substrate coated with titanium oxide can cause light interference between light reflected at the surface of the titanium oxide layer and light reflected at the surface of the substrate, thereby developing vivid interference colors
Data Source
AI summary
The present invention provides an interference pigment that develops interference colors even on light-colored bases. An interference pigment 1 of the present invention includes: a flaky inorganic substrate 10; a transparent metal layer 20 that coats the inorganic substrate 10; and a metal oxide layer 30 that coats the metal layer 20.