This set uses BCH Premium Pigment Ink which is compatible with the original pigment ink. This ink is to be used in a black cartridge of 564, 920, 910, 934 (NOT a photo black cartridge). BCH ink lowers cost and produces a wider color range, resulting in more accurate colors in photo prints. BCH inks produce a wider gamut for more vivid color, durable prints resist fading. Match or Exceed OEM specification on color, pH, surface tension, and viscosity. Ideal for printing shops and small businesses. Reliable brand and Big Savings. Get premium image quality at competitive prices. Downloadable instructions are available. 3 years shelf life under normal sealed storage without direct heat and sunlight.