Precipitated barium sulfate M-series products, when added as extender pigments to coatings and inks, can synergistically disperse pigments, reduce pigment usage, and improve efficiency. They offer advantages such as increased solids content, reduced VOCs content, high gloss, and good thixotropy. When used as fillers and reinforcing agents in plastic and rubber products, they can improve chemical resistance, mechanical strength, and thermal stability, while maintaining good compatibility with resins and preserving various mechanical properties.