Non-Permeable Image Recording to Suppress Bleeding and Dot Embedding
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Solution Overview
Problem
Existing image recording methods on non-permeable substrates face issues of bleeding between colors and dot embedding during multicolor image recording, which degrade the color gamut and image quality.
Innovation Solution
An image recording method involving a pretreatment liquid with an aggregating agent and resin, followed by specific inks with controlled droplet volumes, contact angles, acid values, and droplet intervals, to suppress bleeding and dot embedding on non-permeable substrates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a pretreatment liquid containing water, an aggregating agent, and a resin is applied onto a non-permeable substrate followed by ink jet inks, then the substrate surface is prepared for multicolor image recording, but bleeding between colors and dot embedding occur
Solution Approach 1:
The patent applies parameter changes by precisely controlling the contact angle θ of the first ink within 10° to 70° and the droplet volume V1 within 0.1 pL to 10 pL. These parameter optimizations prevent both bleeding between colors and dot embedding, achieving high image quality and color separation precision simultaneously on non-permeable substrates
Solution Approach 2:
The patent employs preliminary action by applying a pretreatment liquid containing water, an aggregating agent, and a resin onto the non-permeable substrate before ink jet recording. This preliminary treatment modifies the substrate surface properties to enable precise ink deposition without bleeding or dot embedding
2Manufacturing precision
If the droplet volume V1 and contact angle θ are optimized to prevent dot embedding, then color gamut is improved, but bleeding between colors may occur
Solution Approach 1:
The patent resolves this contradiction through parameter changes by establishing specific ranges for droplet volume V1 (0.1 pL to 10 pL) and contact angle θ (10° to 70°). Within these ranges, the ink forms precise dots without embedding while preventing bleeding between colors, achieving both dot formation precision and color separation
3Manufacturing precision
If ink jet recording is performed with controlled parameters, then bleeding and dot embedding are suppressed, but the process complexity increases
Solution Approach 1:
The patent manages process complexity through parameter changes by defining practical ranges for droplet volume (0.1 pL to 10 pL) and contact angle (10° to 70°). These ranges can be controlled using standard ink jet technology without requiring complex measurement and control systems, making the process industrially feasible
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 effectively suppresses bleeding and dot embedding, enhancing the color gamut and image quality of multicolor images on non-permeable surfaces.
Implementation Method 1
a multicolor image may be recorded by applying a pretreatment liquid containing water, an aggregating agent, and a resin
Implementation Method 2
θ represents a contact angle of the first ink at a time point when T seconds have elapsed after the first ink has landed on the region onto which the pretreatment liquid has been applied
Data Source
AI summary
An image recording method including a step of applying a pretreatment liquid, a first ink, and a second ink in this order onto a non-permeable substrate, in which a value (1) is 28.0 to 35.0 and a value (2) is −200 to 200. V1 represents a volume (pL) of a liquid droplet of the first ink, θ represents a contact angle (°) of the first ink, Av1 represents an acid value (mgKOH/g) of the first ink, Av2 represents an acid value (mgKOH/g) of the second ink, S1 represents a solid content amount (% by mass) of the first ink, S2 represents a solid content amount (% by mass) of the second ink, and T represents a droplet interval (seconds) between the first ink and the second ink. Value (1)=(V1)1/3×(1+cos θ)×14. Value (2)=|Av1/S1−Av2/S2|×(Av2−Av1)/T.