Purchased two black toner cartridges for an HP CP-1215. Replaced one immediately, and used the second as a spare. First one worked OK, not really good, blacks had a greyish tinge. 6 months later, replaced with second cartridge, this has better blacks, but also comes with a uneven band of black toner down right side of page. When questioned by phone, they said too bad, only have 90 policy for returns. Purchase ink at your peril with this bunch . . . . .