Keep business documents moving with a black toner cartridge designed for Lexmark color laser platforms in the CS/CX421, 52X, and 62X families. The 78C1XKE is specified as a corporate toner cartridge, making it a fit for organizations that want predictable output quality and supply continuity across shared print environments. For procurement teams, the value is in standardization. A cartridge matched to the supported device family reduces guesswork during replenishment and helps preserve print quality across routine office workflows. Black output remains clear and legible for reports, correspondence, and internal documentation, while the cartridge format supports straightforward replacement at the device. This is the right choice when print reliability matters enough to justify OEM supply selection. It is intended for environments that depend on consistent output, controlled supply sourcing, and fewer interruptions from mismatched consumables. If your fleet includes compatible Lexmark CS/CX421, 52X, or 62X models, this cartridge keeps the supply chain aligned with the hardware it was built for.