Functional Powder Printing Layers for Gloss and Surface Roughness
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Solution Overview
Problem
The use of functional powders like pearl pigments in printing results in a rough surface due to their large particle size, affecting design expression and potentially losing glitter and gloss, especially when using inkjet printing methods.
Innovation Solution
A manufacturing method involving a post-application medium preparation, forming an ink layer on the functional powder-containing film using an inkjet head, and then applying a translucent layer to enhance design expression by curing the ink in a matte tone and adding a translucent layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a functional powder-containing liquid (pearl pigment) is applied to the medium, then the design expression capability is improved, but the surface becomes rough due to large particle size, causing loss of glitter and gloss
Solution Approach 1:
The patent applies a base coat of the functional powder-containing liquid to the medium before applying the ink layer. This preliminary application establishes the desired design expression capability and surface texture, which then serves as the foundation for subsequent inkjet printing operations. The base coat is allowed to dry and set before the ink layer is applied, ensuring that the functional powder particles are properly positioned and the surface is ready to receive the ink without excessive roughness interference.
2Adaptability or versatility
If inkjet printing is performed on the functional powder-containing application film, then design flexibility is improved, but the ink layer surface becomes rough and loses translucency, affecting visual effects
Solution Approach 1:
The patent employs different ink formulations for different layers: a base ink layer that is compatible with the functional powder surface and a translucent top layer that restores gloss and visual effects. The translucent layer is specifically designed with properties that allow it to smooth over the underlying roughness while maintaining the design expression from the base layer. This localized differentiation of ink properties at different depths resolves the contradiction between design flexibility and surface quality.
3Loss of information
If the ink layer is formed to sufficient thickness to achieve design expression, then the design visibility is improved, but the surface roughness increases and glitter/gloss is lost
Solution Approach 1:
The patent resolves the contradiction by transitioning from a single-layer ink approach to a multi-layer vertical structure. The base ink layer provides design visibility and expression, while the translucent top layer restores surface smoothness and visual effects. This dimensional approach allows the design to be expressed in the lower layer while the upper layer compensates for surface roughness, achieving both design visibility and surface quality simultaneously through vertical layering rather than horizontal thickness adjustment.
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 allows for the creation of printed matters with high designability by minimizing the impact of the functional powder's surface roughness and maintaining desired visual effects.
Implementation Method 1
forming an on-application-film ink layer that is a layer of ink stacked on the application film by ejecting ink onto the application film using a printing apparatus; in which the printing apparatus includes an inkjet head that ejects ink by inkjet method
Implementation Method 2
a curing unit that cures the ink ejected by the inkjet head, and in the on-application-film ink layer forming step, the printing apparatus is caused to form the on-application-film ink layer under a print condition to cure the ink ejected by the inkjet head in a matte tone by the curing unit
Data Source
AI summary
A manufacturing method for a printed matter creates a printed matter in which a functional powder-containing liquid containing a functional powder is applied to at least a part of a medium, the manufacturing method including: a post-application medium preparing step of preparing a post-application medium that is the medium on which an application film of the functional powder-containing liquid is at least partially formed; an on-application-film ink layer forming step of forming an image layer to be an on-application-film ink layer by ejecting ink onto the application film using a printing apparatus; and a translucent layer forming step of forming a translucent layer that is a layer with translucency covering the image layer. In the on-application-film ink layer forming step, the printing apparatus is caused to form the image layer under a print condition to cure the ink in a matte tone by the curing unit.