A dispersant for inks is a critical chemical additive whose primary mission is to achieve perfect and stable dispersion of pigment particles within the vehicle. During ink manufacturing, fine pigment powders inherently tend to agglomerate into difficult-to-break aggregates. Utilizing its amphiphilic molecular structure, the dispersant functions by having one end strongly anchor onto the pigment surface while the other end is compatible with the resin vehicle. This action generates powerful electrostatic repulsion or steric hindrance, effectively separating the pigment particles and maintaining their stable state. This process not only significantly enhances grinding efficiency and reduces energy consumption but also fully develops the pigment's coloring strength and transparency. Consequently, it ensures the ink possesses vibrant color, excellent rheological properties, and superior printability. Ultimately, it prevents printing defects caused by poor dispersion, such as uneven gloss, fuzzy dots, screen clogging, and poor storage stability, making it essential for producing high-quality printed materials.