Ceramic Plate Glaze Composition for Angle-Dependent Anti-Counterfeiting
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Solution Overview
Problem
Existing anti-counterfeiting methods in ceramic products, such as fluorescent or temperature-sensitive materials, either affect the surface decoration or are not suitable for achieving a desired visual effect, and inorganic color-changing materials can cause opacification and white lines, making them unsuitable for anti-counterfeiting purposes.
Innovation Solution
A ceramic plate preparation method involving the application of a green body, overglaze, pattern, protective glaze, and anti-counterfeiting material comprising titanite, high-refractive-index oxide, and low-temperature glaze powder, where the anti-counterfeiting material sinks into the protective glaze during firing, creating a visual effect that reflects brightly when aligned with the light path but not when deviating from it.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If inorganic color changing materials such as tungstate series materials or neodymium oxide are used for anti-counterfeiting, then color changing effect is achieved, but the materials themselves have colors that affect the surface decoration of ceramic products
Solution Approach 1:
The patent extracts the harmful color property from the anti-counterfeiting material system by separating the high refractive index oxide (providing brightness) from colored inorganic materials. The anti-counterfeiting effect is achieved through refractive index difference rather than intrinsic material color, thus removing the negative impact on surface decoration while maintaining the anti-counterfeiting function.
Solution Approach 2:
The patent changes the fundamental parameter from material color to refractive index for achieving the anti-counterfeiting effect. By controlling the refractive index of the glaze layer to be higher than the substrate, the material creates a bright reflection effect without introducing unwanted colors, thereby resolving the contradiction between anti-counterfeiting effectiveness and surface decoration quality.
2Illumination intensity
If high refractive index material is used with high content and fine particle size to achieve metallic luster, then decorative effect is improved, but the tile surface becomes opaque and forms white lines
Solution Approach 1:
The patent changes the particle size parameter from fine (problematic) to coarse (0.5-2.0mm) to eliminate opacification and white lines while maintaining the metallic luster effect. This parameter change allows the high refractive index material to provide brightness without causing surface uniformity issues.
Solution Approach 2:
The patent uses a composite glaze system combining multiple components (alumina silicate glass, metal oxides, and high refractive index material) where each component serves a specific function. The alumina silicate glass matrix provides transparency, while the dispersed high refractive index particles provide brightness, achieving both metallic luster and surface uniformity.
3Ease of manufacture
If fluorescent or temperature sensitive color changing materials are used for anti-counterfeiting, then anti-counterfeiting function is achieved, but these materials are not suitable for achieving the desired bright reflection visual effect
Solution Approach 1:
The patent changes the optical mechanism from fluorescence or thermochromism to refraction-based reflection. By utilizing the refraction of light through the high refractive index oxide particles embedded in the glaze, the system achieves a bright reflection effect that is visible under normal lighting conditions, unlike fluorescent or temperature-sensitive materials that require specific activation conditions.
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 method achieves a distinct anti-counterfeiting visual effect by controlling the composition and application of materials to prevent opacification, ensuring a bright reflection only when aligned with the light path, thus providing effective identity authentication.
Implementation Method 1
a high-intensity refraction effect is achieved when a sight line direction is consistent with a path of reflected light
Implementation Method 2
the titanite and the high-refractive-index oxide being wetted and wrapped by a molten liquid generated by melting the low-temperature glaze powder and sunken into the protective glaze
Implementation Method 3
the titanite and the high-refractive-index oxide being wetted and wrapped by a molten liquid generated by melting the low-temperature glaze powder
Data Source
AI summary
A preparation method comprises: preparing a green body using green body powder; applying an overglaze on the surface of the green body; ink-jet printing a pattern on the surface of green body; applying a protective glaze on the surface of the green body; applying an anti-counterfeiting material on the surface of the green body; firing the green body, titanite and high-refractive-index oxide being wetted and wrapped by a molten liquid produced by melting a low-temperature glaze powder in a firing environment, and sunken into the protective glaze without generating opacification; and then polishing to obtain a ceramic plate having an anti-counterfeiting visual effect. The anti-counterfeiting visual effect is a visual effect in which a high-intensity refraction effect is achieved when the sight line direction is consistent with the path of reflected light, but no refraction effect is achieved when the sight line direction deviates from the path.