If a fluid with a higher viscosity is used instead of water, the movement of dyes will be slower and more sluggish. The higher viscosity of the fluid will resist the flow of the dyes, making them spread and diffuse more slowly. Additionally, the dyes may exhibit more clumping or aggregation in a high viscosity fluid, as the resistance to flow will hinder their ability to disperse evenly. The overall movement and diffusion of the dyes will be hindered by the thicker fluid, resulting in slower and less expansive spread.
