Thermal Transfer Ink Layering for Accurate Color Through Translucent Films

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Solution Overview

Problem

Existing thermal transfer recording media struggle to visually represent the color of a first ink layer accurately when a second ink layer is applied as the observation surface, as the second ink layer obscures the first ink layer's color.

Innovation Solution

A thermal transfer recording medium with a first ink layer and a second ink layer, where the second ink layer is translucent, allowing visual recognition of the first ink layer through it, and has a complementary color relationship with the first ink layer.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a second ink layer is applied as the observation surface layer, then the structure provides a complete laminated ink system, but the color of the first ink layer cannot be accurately perceived through the second ink layer

Engineering Contradiction:

Improvecolor fidelityVSAvoidink layer structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent applies color change principles by selecting ink layers with complementary color relationships. The second ink layer (observation surface layer) is designed to have translucency and complementary color properties that allow the first ink layer's color to be accurately perceived through it, effectively using color theory to resolve the visibility issue while maintaining structural completeness

Inventive Principle:

Principle #32Color changes

Solution Approach 2:

The patent changes the optical parameters of the second ink layer by controlling its translucency and color characteristics. By adjusting these parameters to achieve complementary color relationships and appropriate translucency levels, the system enables accurate color perception of the first ink layer through the second ink layer without requiring structural simplification

Inventive Principle:

Principle #35Parameter changes

2Quantity of substance

If the second ink layer is made opaque to provide complete coverage, then the observation surface is fully covered, but the first ink layer's color cannot be visually recognized

Engineering Contradiction:

Improveink layer coverageVSAvoidcolor information

Core Design Contradiction:

Quantity of substanceVSLoss of information

Solution Approach 1:

Instead of making the second ink layer opaque, the patent uses color change principles by selecting inks with complementary color relationships. This allows the second ink layer to provide coverage while simultaneously allowing the first ink layer's color information to be perceived through it, eliminating the need for opacity

Inventive Principle:

Principle #32Color changes

Solution Approach 2:

The second ink layer acts as an intermediary that transforms the appearance of the first ink layer's color through complementary color relationships. Rather than blocking color information, it mediates the visual perception to enhance color fidelity while maintaining coverage

Inventive Principle:

Principle #24Intermediary (Mediator)

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 second ink layer's translucency enables the first ink layer's color to be accurately perceived, maintaining color fidelity even when covered, by acting as a front surface layer.

Implementation Method 1

the second ink layer has translucency that allows for visual recognition of the first ink layer

Methodology Applied

Scientific EffectTranslucency:

Implementation Method 2

the second ink layer has a complementary color relationship with the first ink layer

Methodology Applied

Scientific EffectComplementary color relationship:

Data Source

PatentUS20260042309A1Thermal-transfer recording medium, transferred-medium film, and method for producing transferred-medium film

Publication Date: 2026.02.12 BROTHER KOGYO KK

AI summary

A thermal transfer recording medium is a thermal transfer recording medium to be transferred to a transparent film, including: a base material layer; and a first ink layer and a second ink layer that are sequentially laminated on the base material layer, in which the second ink layer has translucency that allows for visual recognition of the first ink layer, and has a complementary color relationship with the first ink layer. Also, a transfer-completed film is a transfer-completed film with a first ink layer, a second ink layer having translucency that allows for visual recognition of the first ink layer, and a transparent film laminated in this order, in which the second ink layer has a complementary color relationship with the first ink layer.