Your photo prints are going grey where they should be deep black. That's the photo black cartridge calling it quits. This is the genuine HP 564 photo black, part number CB317WA. Swap it in and your blacks go back to proper blacks. In stock – grab it before the next print job
| brand | HP |
| colour | Photo Black |
| part_number | CB317WA |
| series | 564 |
| type | Ink Cartridge |