UltraChrome Pro12 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 colour accuracy and archival level image stability.Ink dries quickly to produce prints that are water and scratch resistant. The ink set includes Vivid Magenta for brighter blues and pinks as well as Light and Dark Grey for improved balance with neutral greys, reduced bronzing and minimal colourcasts/colour twist.The Pro formulation features improved Matte and Photo Black inks that provide an enhanced Dmax for brighter prints with an enhanced tonal range in both B/W and colour. It also features a new Yellow ink that provides further durability enhancement with increased UV light resistance. With the addition of the Violet ink cartridge this ink set can offer 99% Pantone coverage.