The HP 771A DesignJet Ink Cartridge series is a high-volume, professional ink line designed for specific HP DesignJet production and photo printers, delivering 775 ml of pigment-based ink per single pack. Equipped with HP Vivid Photo Inks, this series is formulated for archival-quality fine art prints, high-end photography, posters, and backlit displays that require high fade-resistance and a wide color gamut.