Ceramic Ink Registration on Glass via Differential Thermal Expulsion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for partial ceramic printing on glass substrates often result in inconsistent appearances due to the migration of glass frit, leading to a 'ghost image' effect and a matt finish in areas where frit has migrated, which is undesirable for one-way vision panels and other applications requiring exact registration and uniform appearance.
Innovation Solution
A method involving the application of multiple layers of ink with differential thermal expulsion properties, where the ink medium is selectively removed outside the print pattern during a heat fusing process, preventing the glass frit and pigment from bonding to the substrate and ensuring exact registration and a uniform glossy appearance within the print pattern.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If glass frit is used in ceramic ink layers to bind layers to glass substrate, then durable adhesion and exact registration are achieved, but glass frit migrates to areas outside the print pattern causing ghost images and inconsistent appearance
Solution Approach 1:
The patent introduces a barrier layer comprising particles with melting points higher than the heat treatment temperature. This barrier layer acts as an intermediary between the glass frit-containing ink layers and the glass substrate, preventing glass frit migration outside the print pattern while allowing controlled adhesion within the pattern boundaries.
Solution Approach 2:
The patent changes the physical and chemical parameters of the ink layers by controlling the proportion of ink medium and glass frit, and by selecting particles with specific melting points for the barrier layer. These parameter changes enable selective adhesion within the print pattern while preventing migration outside it.
2Strength
If glass frit migrates outside the print pattern during heat treatment, then ink layers bond to glass substrate, but the appearance becomes matt and inconsistent in non-print areas
Solution Approach 1:
The patent applies local quality by creating different properties in different areas: within the print pattern, glass frit bonds to create durable adhesion, while outside the pattern, the barrier layer prevents frit migration and maintains the original glossy surface appearance of the glass substrate.
3Reliability
If multiple layers of ceramic ink are applied with high glass frit content for durability, then strong adhesion is achieved, but the complexity of controlling exact registration increases
Solution Approach 1:
The patent segments the ink application process into distinct functional layers: barrier layers with high melting point particles and ink layers with glass frit. This segmentation allows each layer to perform its specific function independently, simplifying the control of exact registration while maintaining durable adhesion.
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
This method achieves durable, exact registration of ceramic ink layers on glass substrates, preventing unwanted bonding and ensuring a consistent, glossy appearance, thereby eliminating the 'ghost image' effect and enhancing the aesthetic and functional properties of vision control panels and other products.
Implementation Method 1
said ink medium undergoes differential thermal expulsion outside said print pattern compared to inside said print pattern
Implementation Method 2
said pigment and said glass fit forms a durable image material adhered to said substrate within said print pattern
Data Source
AI summary
A method of partially imaging a substrate, for example glass, with a print pattern comprising layers of ceramic ink in substantially exact registration. The method relies on a mask ink layer defining the print pattern and differential thermal expulsion of ceramic ink medium during a heat fusing process between the areas outside the print pattern and within the print pattern. This results in pigment and glass frit forming a durable image material adhered to the substrate within the print pattern and non durable material outside the print pattern, enabling its removal outside the print pattern to leave the desired layers of ceramic ink within the print pattern in substantially exact registration.