Brilliant Toner Charge Distribution for Uniform Color
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Solution Overview
Problem
Existing methods for forming mixed color images using brilliant toners result in images with deteriorated brilliance and uneven color tones, particularly when using flake-shape brilliant pigments and on uneven or easily chargeable recording media.
Innovation Solution
A brilliant toner composition comprising a first and second toner with flake-shape brilliant pigments of different colors, where the charge distribution peaks and full widths at half maximum are within specific limits to ensure similar charging properties and prevent irregular reflection and color tone variations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If multiple brilliant toners of different colors are sequentially laminated to form mixed color images, then the image formation process is completed, but the brilliance of the fixed image deteriorates compared to single layer images
Solution Approach 1:
The patent combines multiple brilliant toners of different colors into a single mixed color toner composition. The toner particles are co-developed together with a carrier to form a unified developer system, eliminating the need for sequential lamination of separate toner layers. This merging approach maintains brilliance by preventing the deterioration that occurs when multiple brilliant toner layers are stacked, while still achieving mixed color images through the combined toner composition.
2Ease of operation
If a mixed color toner is used to form images on uneven recording media, then the imaging process is simplified, but areas with different color tones are generated at concave portions
Solution Approach 1:
The patent carefully controls the charge distribution parameters of the mixed color toner composition. By adjusting the charge spectrograph characteristics (peak positions and full widths at half maximum) of the individual brilliant toners and their mixture, the invention optimizes the electrostatic charging behavior. This parameter control ensures uniform charge distribution across the toner particles, which prevents color tone variations in concave portions of uneven recording media while maintaining the simplicity of using a single mixed color toner.
3Ease of operation
If a mixed color toner is used on easily chargeable recording media, then the imaging process is simplified, but areas with different color tones are generated at end portions of images
Solution Approach 1:
The patent optimizes the charge distribution parameters of the mixed color toner composition to match the charging characteristics of easily chargeable recording media. By controlling the peak positions and full widths at half maximum of the charge spectrograph for each brilliant toner and their mixture, the invention ensures uniform charge transfer across the entire image area, including end portions. This parameter optimization prevents color tone variations while maintaining the simplified imaging process using a single mixed color toner.
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 solution enables the formation of images with high brilliance and uniform color tones by preventing irregular pigment alignment and charging variations, thus maintaining image quality on various recording media.
Implementation Method 1
a first brilliant toner which contains a first toner particle containing a flake-shape brilliant pigment
Implementation Method 2
based on a charge distribution of each of the first brilliant toner and the second brilliant toner obtained according to a charge spectrograph method
Data Source
AI summary
A brilliant toner includes a first toner which contains a first toner particle containing a flake-shape brilliant pigment; and a second toner which contains a second toner particle containing a flake-shape brilliant pigment, and has a different color from that of the first toner, and an electrostatic charge image developing toner includes a first toner which contains a first toner particle; and a second toner which has a different color from that of the first toner, and contains the second toner particle, in which, based on a charge distribution of each of the first toner and the second toner obtained according to a charge spectrograph method, maximum peak positions of the first toner and the second toner are taken as P1 and P2, respectively, and full widths at half maximum of the first toner and the second toner are taken as W1 and W2, respectively, |P1−P2| is 3 mm or less, and |W1−W2| is 3 mm or less.