For Canon MC-05 Maintenance Cartridge

The MC-05 Maintenance Cartridge is a necessary component of the imagePROGRAF iPF500, iPF510, iPF5000, and iPF5100 professional large format printers.
It serves as the receptacle for waste ink during cleaning and normal startup subroutines, and is required for operation. Periodic exchange of the MC-05 assures the highest quality printing results with your imagePROGRAF printer.
Your printer's software will indicate the status of your MC-05, and for best results it should be exchanged at ~80% capacity.