Selective Tinting by Material Permeability for Complex Substrates
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Solution Overview
Problem
Existing methods for selectively tinting substrates with complex surfaces or small patterns are time-consuming and costly, as they require masking and unmasking processes that are not feasible with intricate structures.
Innovation Solution
A method involving a substrate with distinct material portions, where the first material is permeable to dyes when heated and the second material is impermeable, allowing selective tinting without a mask, using a dye source that releases dyes upon heating and rinsing to eliminate surface dyes, ensuring only the first material absorbs the dye.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If masking method is used for selective tinting, then tinting selectivity is achieved, but manufacturing time increases and process complexity increases
Solution Approach 1:
The substrate surface is divided into regions with different material properties: a first material that is permeable to dyes and a second material that is impermeable to dyes. This local differentiation of material properties enables selective tinting without requiring masks, as the dye naturally penetrates only the permeable regions during the heating process.
Solution Approach 2:
The mechanical masking system is replaced by a material-based selection system. Instead of using physical masks to block dye application, the invention uses the inherent permeability differences between materials to achieve selective dye penetration, eliminating the need for mechanical mask application and removal steps.
2Manufacturing precision
If masking method is used for selective tinting, then tinting selectivity is achieved, but device complexity increases
Solution Approach 1:
The substrate surface is divided into regions with different material properties: a first material that is permeable to dyes and a second material that is impermeable to dyes. This local differentiation of material properties enables selective tinting without requiring masks, as the dye naturally penetrates only the permeable regions during the heating process.
Solution Approach 2:
The mechanical masking system is replaced by a material-based selection system. Instead of using physical masks to block dye application, the invention uses the inherent permeability differences between materials to achieve selective dye penetration, eliminating the need for mechanical mask application and removal steps.
3Area of stationary object
If conventional tinting method is used on complex surfaces, then complete surface coverage is achieved, but selectivity is lost
Solution Approach 1:
The substrate surface is divided into regions with different material properties: a first material that is permeable to dyes and a second material that is impermeable to dyes. This local differentiation of material properties enables selective tinting without requiring masks, as the dye naturally penetrates only the permeable regions during the heating process.
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
Enables fast, economical, and selective tinting of substrates with complex structures, maintaining transparency and preventing dye penetration into impermeable areas, thus achieving clear vision and reduced light diffusion.
Implementation Method 1
the dye source is adapted to release the dyes when the source is heated
Implementation Method 2
heating the dye source in proximity to the exposed surface of the substrate, so that dyes are transferred from the dye source onto the exposed surface of the substrate
Implementation Method 3
heating the substrate, so that the dyes which were transferred onto the first surface portion penetrate into the first material
Implementation Method 4
the second material may have a gelation or softening temperature which is higher than that of the first material
Implementation Method 5
the second material may have a gelation or softening temperature which is higher than that of the first material
Data Source
AI summary
The invention relates to a selective dyeing method used for dyeing a substrate (10), selectively within a first exposed surface portion (S1) of said substrate. For this purpose, the substrate consists of a material (2) that is impervious to a dye with the exception of the first portion of the exposed surface. In particular, the impervious material can form a layer which covers a base portion (3) of the substrate in a second portion (S2) of the exposed surface. The substrate is heated such that the dye (C) penetrates a pervious material (1) which constitutes the first portion of the exposed surface. The method is particularly useful for eliminating light diffused by the walls of a multilayer structure which is supported by means of ocular glass.