Based on a Buyers Laboratory Inc. 2014 study commissioned by HP for the on-average performance of cartridges refilled and remanufactured by leading refill service providers compared to Original HP Ink cartridges (60XL Black, 60XL Colour, 61XL Black, 61XL Colour, 74XL Black, 75XL Colour, 564XL Black, 564XL Cyan, 564XL Magenta, 564XL Yellow, 950XL Black, 951XL Cyan, 951 XL Magenta and 951XL Yellow) sold in North America; http://www.buyerslab.com/products/samples/HP-Inkjet-Cartridges-vs-Refilled-Cartridges.pdf PDF 1.4MB