Toner cartridges are the most important consumables for laser printers. Laser printer toner cartridges can be divided into the following three categories according to the combination method:
①Integrated toner cartridges: photoconductive drum (photosensitive drum), magnetic drum (developing roller) and toner cartridge are integrated toner cartridges. In principle, this toner cartridge design structure does not allow users to add toner by themselves, but with the update of technology, this type of toner cartridge can also be added with toner.

②Two-in-one toner cartridge: refers to a toner cartridge that is divided into two independent parts: one is the photosensitive drum, and the other is the magnetic drum and toner cartridge. After the user runs out of toner, the magnetic drum and toner cartridge can be replaced without replacing the photosensitive drum.

③Three-in-one toner cartridge: refers to a toner cartridge that is divided into three independent parts: photosensitive drum, magnetic drum, toner cartridge. After the user runs out of toner, he only needs to replace the toner cartridge.