Water-Based Ink Composition Preventing Banding and Bleeding

The patent applies parameter changes by precisely controlling the concentrations of multiple surfactants and glycol ethers in the ink formulation. Specifically, it uses an acetylene glycol-based surfactant (0.1-0.3% by weight), tripropylene glycol methyl ether (2.5-4.5% by weight), and tripropylene glycol n-butyl ether (0.5-1.5% by weight). This multi-parameter optimization resolves the contradiction by achieving proper permeability for uniform solid printing while maintaining color separation and vaporization characteristics through the balanced composition of these components.

The patent employs composite materials by combining multiple surfactant types and glycol ether compounds in specific proportions. The formulation integrates an acetylene glycol-based surfactant with tripropylene glycol methyl ether and tripropylene glycol n-butyl ether to create a composite ink system. This composite approach allows the ink to simultaneously achieve enhanced permeability for eliminating banding while maintaining adequate color separation and vaporization properties through the synergistic effects of the combined components.

The patent resolves this contradiction through parameter changes in the ink's chemical composition, specifically optimizing the surfactant and glycol ether content to achieve appropriate viscosity and surface tension. The formulated ink maintains optimal flow characteristics that enable proper solid printing portion filling even at low resolution settings, thereby allowing high recording speed without sacrificing print quality or producing banding effects.

The patent applies local quality by creating ink with differentiated functional properties through its composite formulation. The specific combination of acetylene glycol-based surfactant and glycol ethers provides localized optimization of wetting and flow characteristics, enabling the ink to properly fill solid printing portions under various recording conditions including low resolution high-speed printing, thus eliminating banding while maintaining productivity.

The patent applies parameter changes by optimizing the chemical composition parameters of the ink vehicle surrounding the pigment particles. Through precise control of surfactant concentration (acetylene glycol-based surfactant at 0.1-0.3%) and glycol ether content (tripropylene glycol methyl ether at 2.5-4.5%, tripropylene glycol n-butyl ether at 0.5-1.5%), the formulation achieves proper balance between color strength from the pigment and improved vaporization characteristics and bleeding resistance from the optimized liquid matrix.

The patent uses intermediary substances (surfactants and glycol ethers) to mediate between the pigment particles and the water-based carrier. These intermediary components improve the interaction between pigment and carrier, enhancing color strength while simultaneously improving vaporization characteristics and bleeding resistance by modifying the ink's overall surface tension, wetting properties, and evaporation behavior through the selected surfactant and glycol ether combination.