Sophia Global Remanufactured Ink Cartridge Replacement for HP 935XL (1 Cyan, 1 Magenta, 1 Yellow) Page Yield: Up to 825 Pages per Cyan, 825 Pages per Magenta, 825 Pages per Yellow ISO 9001 Quality Certified Manufacturing Process These cartridges were used once and then sent to our factory where they underwent an extensive process including cleaning, testing the chips, and ink refilling. Before being sealed, the cartridges were tested in a live printer to ensure crisp text and true color reproduction. The cartridges were finally sealed and placed in a static protective bag. Depending on the state of the chips on the cartridges, some will read the correct ink level and some will not. Despite the ink level reading, the cartridges should perform normally as if it were reading full and provide quality prints for the full life of the cartridges.