HP 7800 - Manual (Page 15)

not being used. Failure to properly store your cartridge can cause the cartridge to
malfunction.
➔ To insert a cartridge into the cartridge protector, slide the cartridge into the
protector at a slight angle and snap it securely into place.
Once you have inserted a cartridge into the cartridge protector, place it in the storage
area located in the printer.
Chapter 2
12 HP Photosmart 7800 series