Ink Refill Kit for Canon PIXMA MX850 Printers using CLI 8 PGI 5 Cartridges Archival ink is filtered to 0.2 um, which is the same as original ink. The advanced archival ink formula prevents ink foam from appearing in the ink chamber The archival ink produces a bright, vibrant print with strong life-like color intensity Equivalent to 50 Cartridges - Save $750 Compared to Buying New Cartridges Refill your empty original cartridges and continuous ink systems within 5 minutes with this complete kit.