Water-Based Ink Color Stability via Boron Mediators

The patent introduces a specific compound (formula 1) as an intermediary substance that mediates between the high weather resistance magenta dye and the recording medium. This compound contains a nitrogen-containing six-membered aromatic ring with specific substituents (R1-R7) that enable it to interact with both the dye molecules and the recording medium, thereby maintaining stable diffusibility while preserving the dye's weather resistance properties.

The patent modifies the chemical parameters of the ink formulation by introducing a specifically structured compound with defined molecular characteristics (nitrogen-containing aromatic ring, specific substituent groups R1-R7). This parameter change in the ink composition alters the interaction dynamics between the dye and recording medium, stabilizing diffusibility under varying humidity conditions while maintaining the dye's inherent weather resistance.

The compound of formula 1 acts as a mediator that prevents excessive diffusion of the magenta dye while maintaining proper color mixing in process black. By controlling the interaction between the dye and recording medium, it ensures that magenta, yellow, and cyan inks mix accurately to produce neutral black without green tinges, while still providing the light resistance benefits of high weather resistance dyes.

The patent changes the chemical parameters of the magenta ink formulation by incorporating the specifically structured compound (formula 1). This parameter change optimizes the diffusion characteristics and color mixing properties, enabling process black to achieve accurate neutral tones while maintaining the light resistance provided by high weather resistance dyes.