Like others, I felt that the prices of Original HP cartridges took advantage of me. I bought these cartridges and the results have been mixed. HP OfficeJet Pro 6978 printer. When I install cartridges, it warns that they are not HP OEM. When I bought it, I realized that this could be a problem. However, the color cartridges do not work properly. Cyan is never used while magenta and yellow try to compensate and of course never match the color of the document. The black cartridge (large quantity) is working properly. I'm not sure if the printer is trying to reject color cartridges because they aren't OEM products, or if it's because of the cartridges themselves. I've never had this problem with OEM cartridges, but color cartridges are pretty much useless at the moment.
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