Genuine OEM HP PhotoSmart C6340 Ink and Supplies
The HP Photosmart C6340 keeps black, photo black, cyan, magenta, and yellow in separate HP 564 cartridges. This lets you choose capacity by ink, but it also means the main black and photo black labels need to be read carefully.
At Toner Buzz, genuine HP 564 choices include standard and XL singles, a three-color pack without black, a four-color XL set, and a standard black two-pack. Use singles to mix capacities by color, or choose a pack whose contents match the inks you need.