Orange Toner Using Fluorescent Dye for High Lightness
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Solution Overview
Problem
In electrophotography, the reproduction of orange images with high lightness and saturation is challenging due to limitations in color reproducibility in the high lightness region of secondary colors, as existing toners struggle to combine yellow and magenta toners effectively.
Innovation Solution
An orange toner formulation incorporating a binder resin and a colorant with a first color material having a hue angle of −20° to 80° and a second color material of C.I. Solvent Orange 63, where the second color material is present in a specific mass ratio to enhance lightness and saturation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If yellow and magenta toners are superimposed to reproduce orange, then orange images can be formed, but saturation and lightness decrease
Solution Approach 1:
The patent applies color changes by incorporating C.I. Solvent Orange 63, a fluorescent color material, which emits light in the orange region (560-620 nm) when excited by UV light. This fluorescent emission directly enhances the lightness and saturation of orange images without requiring superimposition of yellow and magenta toners, thereby resolving the contradiction between lightness and color reproduction quality
Solution Approach 2:
The patent uses composite materials by combining C.I. Solvent Orange 63 fluorescent dye with a binder resin (polyester resin) and other color materials (C.I. Pigment Orange 36, C.I. Pigment Red 122) to create an orange toner composition. This composite formulation achieves both high lightness through fluorescent emission and high saturation through the synergistic effect of multiple color materials
2Adaptability or versatility
If conventional color materials are used, then manufacturing is simple, but color reproduction range is limited
Solution Approach 1:
The patent applies parameter changes by precisely controlling the content ratios of color materials: C.I. Solvent Orange 63 at 0.05-0.2 parts by mass, C.I. Pigment Orange 36 at 1-5 parts by mass, and C.I. Pigment Red 122 at 1-5 parts by mass relative to 100 parts by mass of binder resin. This optimized parameter combination expands color reproduction range while maintaining manufacturing feasibility
Solution Approach 2:
The patent employs composite materials comprising C.I. Solvent Orange 63 fluorescent dye combined with C.I. Pigment Orange 36 and C.I. Pigment Red 122 in specific ratios, along with polyester binder resin. This composite formulation achieves expanded color reproduction range including high lightness orange images while keeping the formulation manageable for manufacturing
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 orange toner achieves high lightness and saturation in orange images by optimizing the hue angle and content of the color materials, ensuring effective fluorescent emission and improved color reproduction.
Implementation Method 1
the second color material includes C.I. Solvent Orange 63
Data Source
AI summary
An orange toner for developing electrostatic charge images includes a binder resin; and a colorant including a first color material and a second color material; wherein the first color material has a hue angle of −20° to 80° in a L*a*b* color system, the second color material includes C.I. Solvent Orange 63, and the second color material has a content of 0.05 to 0.2 parts by mass to 100 parts by mass of the binder resin.