thread697-1712921: HP Deskjet F340 All-in-One

I've found that refilling ink cartridges can be a real challenge. While I used to attempt it myself, I'm now resigned to using recycled ink cartridges that have been professionally refilled. I think my issue was that I used to refill them too many times. Apparently after about 3 refills the ink cartridge parts become warn and that can adversely impact the quality of the print outs. It sounds like that was happening in the post referenced above for that use who had the HP Photosmart 5510 printer. My advice would be to give professionally recycled ink cartridges a try before abandoning them for the name-brand replacements. I found the 5510's on sale at Castle Ink in case that is helpful: HP Photosmart 5510 ink cartridges