at this point I should like to warn against the wrong end to SAVE! I bought because of good product reviews for the first time in my life replacement cartridges for my HP Officejet 6600. The result in the short version: used cartridges and Cyan expired. My whole head is dirty and due to the error message 'problem with the printer or the ink system "no longer be cleaned via software. Due to the permanently installed print head in this printer he is thus delivered. Really very unfortunate. Especially as the printer previously worked completely without problems.
You learn from mistakes .... :(