Within the Types segment, flotation agents are classified into collectors, frothers, modifiers, and depressants, each serving a unique function in the mineral‑water interface. Collectors, typically xanthates or dithiophosphates, constitute the largest cost component because they form the primary chemical bond with metal sulfide surfaces, dictating ultimate recovery efficiency. Frothers such as MIBC or pine oil are employed in lower concentrations to stabilize the bubble film, influencing the size distribution of the froth and, consequently, the cut‑grade of the concentrate. Modifiers—including activators like copper sulfate and pH regulators—adjust the surface chemistry to enhance collector performance, and they represent a critical lever for tailoring reagent schemes to specific ore chemistries. Depressants, often sodium cyanide or zinc sulfate, selectively inhibit unwanted gangue minerals, allowing for cleaner concentrates and higher downstream profitability. The proportional spend across these types varies by application, but collectively they define the reagent cost structure and drive the overall market valuation.