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HP Inkjet Print Cartridges - HP 78 Inkjet Print Cartridge Specifications

Product name and part number

HP Inkjet print cartridge product name
Part number
HP C6578A tri-color Inkjet print cartridge, large
HP 78
HP C6578D tri-color Inkjet print cartridge, economy
HP 78
The print cartridge number reflects the region in which the Inkjet print cartridge is sold. For example, C6578DN is sold in the US and C6578DL is sold in Latin America. The following list shows the worldwide product numbers.
North America
Latin America
Asia Pacific

HP 78 (C6578 series) Inkjet print cartridges - choosing the right cartridge

HP offers a choice of two C6578 print cartridges to fit most printing needs:
  • C6578A - For frequent home or office-printer use. If replacing print cartridges every four to nine months is necessary, large color Inkjet print cartridges provide the best value and convenience. It is the ideal choice to create such items as business reports, newsletters, schoolwork, correspondence and presentations.
  • C6578D - If occasionally using a home printer and the print cartridge is replaced once a year or less, the economy color Inkjet print cartridge offers a practical product at a lower price. This Inkjet cartridge is ideal for users who occasionally need printers to produce school reports, greeting cards, correspondence, or special projects.

HP Inkjet printers and Inkjet print cartridge compatibility

HP 78 tri-color print cartridges work with HP 45 black Inkjet print cartridges.
HP C6578A and HP C6578D tri-color print cartridges are interchangeable. Both A (Large) and D (Economy) print cartridges are compatible with the following HP printers:

HP color copiers

  • HP Color Copier 180, 190
  • HP Color Copier 280, 290

HP Deskjet printers

  • HP Deskjet 930c, 930c M, 932c, 935c
  • HP Deskjet 940c, 940cvr
  • HP Deskjet 950c, 952c, 955c
  • HP Deskjet 960c series
  • HP Deskjet 970cse, 970cxi
  • HP Deskjet 980c series
  • HP Deskjet 990cse, 990cxi
  • HP Deskjet 1220c, 1220cse, 1220cxi professional series

HP Photosmart printers

  • HP Photosmart P1000
  • HP Photosmart P1100, P1100xi
  • HP Photosmart 1215, 1215vm, 1218, 1218xi
  • HP Photosmart 1115
  • HP Photosmart 1315

HP Printer/scanner/copier

  • HP PSC 750, 750xi

HP Officejets

  • HP Officejet G85, G85xi, G95
  • HP Officejet K60, K60xi, K80, K80xi
  • HP Officejet V40, V40xi

Ink volume and page count

Although the actual print cartridge life may vary and depends on the printer used, the table below provides a guideline to determining how many pages the print cartridge will output. To calculate the approximate cost per page, divide the number of pages into the print cartridge price.
Print cartridge
Ink volume
Page count
38 ml
970 pages at 15% density
19 ml
450 pages at 15 % density

Maintenance of the print cartridge

The printer automatically primes, cleans, and caps the print cartridges to maintain optimum print quality. These operations are not visible to users.
Proper use and handling will provide high print quality and longer print cartridge life. To keep the print cartridges in good working order and the nozzles clear, print at least once a month. Observe the following table:
Do not
Do keep print cartridges sealed in the original packaging until ready to use. Ink can evaporate through the nozzles and the plastic print cartridge body, reducing print cartridge life. Therefore, print cartridges have a longer life when sealed in the packaging.
After opening the print cartridge, do store the print cartridges in the printer in the "home position" to help prevent ink from drying out in the nozzles. This will minimize the risk of contamination with airborne dust particles.
Do press the POWER button to turn the printer off, rather than unplugging the printer.
Do not unplug the printer without turning off the power button first. Pressing the POWER button caps the print cartridge in the service station, preventing ink from drying in the print cartridge nozzles.
Do store print cartridges at room temperature.
Do not re-tape the print cartridge if removing from the printer. If a print cartridge must be removed, store at room temperature in a rigid sealed plastic container. Make sure that the nozzles on the bottom of the print cartridge do not touch the side of the container.
Do store unopened print cartridges in an upright position.
Do not store the unopened print cartridge on its side for long periods of time.

Recommended storage conditions

Operational Temperature:
Min = -15 degrees Celsius
Max = 35 degrees Celsius
Room temperature (no extreme temperatures):
Min = -40 degrees Celsius
Max = 60 degrees Celsius

Altitude restrictions

The HP 78 series Inkjet print cartridges are not designed to be transported in printers at high altitudes, such as on airplanes.
The HP 51633M and HP C6628A Inkjet print cartridges are the only print cartridges designed to be transported in a printer. See the document, Printer/Cartridge compatibility tables, for a list of the printers that can use HP 51633M and HP C6628A print cartridges.

Installation dates

Be sure to use the HP Inkjet print cartridge before the “install by” date on the print cartridge package.


HP Inkjet print cartridges are backed by HP's limited warranty. If the product is defective, contact HP or an HP retailer before the end of the warranty date. All HP Inkjet print cartridges and kits are warranted to be free from defects in materials and workmanship until the end of warranty date.
The end of warranty date is found in YYYY/MM/DD format on the print cartridge (see Figure 1 below).
Figure : Locating the "End of Warranty:" date
For complete print cartridge warranty information, refer to the document, HP Inkjet Print Cartridges - Limited Warranty for HP Print Cartridges.

Related information

For a complete selection of HP Printing Supplies, visit HP's Store online. Here you will find part numbers, specifications, and prices.