UltraChrome K3 builds on the original pigment ink technology developed by Epson for professional photography and proofing work. The ink is not only cost-effective, but delivers prints with exception colour accuracy and high durability. The ink set includes 4 blacks (3 of which can be combined on a single print) that work together to produce outstanding black and white output with superb grey balance and smooth tonal gradations on a wide variety of media types.