Epson T46S1 - 25 ml - photo black - original - ink cartridge - for SureColor P706, SC-P700, SC-P700 Mirage Bundling. UltraChrome PRO ink is based on Epson's famous K3 and HDR ink. It has an aqueous (water-based) all-pigment construction that has been designed for professional and commercial print production. The formulation provides an extended gamut with superior color accuracy and archival level image stability.