Titanium dioxide has high whiteness and hiding power, which allows it to provide a pure, bright white substrate for the ink. In the production of white ink, it can make the ink appear full white, while in color ink, it can adjust the brightness and saturation of the color, making the color more bright and bright, and at the same time effectively cover the background color of the surface of the printing object, avoiding color translucency, and ensuring the clear and complete printing pattern.