After repeated requests, we are now offering the 4 Color Process inks in 4 convenient sizes. These inks will stay open on your equipment, but dry hard on the sheet. Typically used in 4 color process to create images by the overlaying of screened inks at set values. Process Black, Process Cyan, Process Magenta, Process Yellow. Choose from Jars, Tubes, Tins, or 1# Cans.