It's ink, it's black, and if you print on draft mode I think you can get even more pages out of the cartridge - it's every office person's dream. 10/10 would recommend - 5 stars.
I bought this ink cartridge for an HP printer and am very happy with it. The ink lasts for a long time and my printer runs daily for one print job or another.
I do quite a bit of printing and am very pleased with the Genuine HP XL ink cartridges. They last a long time and continue to do a fine job of printing until they are completely used up. I have tried other brands, and even refilled my own cartridges, and found that NOTHING works as well as Genuine HP XL ink cartridges.
Excellent product. I will never buy anything but this brand. I don't have time to mess around with second-rate printer cartridges that may be cheaper but can cause jams.
I am sorry but this review is bias becaus I am a retired HO employee and would not use any other printer than HP. My 8600 and the ink has never failed me and I hav had the printer for 10+ years (I think)
I use only HP High Yield cartridges in my printer because they are the best quality and when used with quality paper provide the highest yield for the longest time.