3oz bottle of Noodler's Kung Te-Cheng fountain pen ink. This ink is Noodler's attempt to replicate the color, depth, behavior, properties, and general characteristics of the first royal ink of ancient China. This is the STRONGEST of all vintage emperor/royal inks. Noodler's inks are handcrafted, so there may be slight color variations from batch to batch. How does one find the color of the Emperor's ink - a color known to be the original royal color, a tinge of purple with deep blue hues, the color that later was also called "royal" in France (as well as Rome)? Though clothing for the Emperor stressed royal Mandarin Yellow and the French court stressed blue/white and purple, the original royal ink was indeed this ink color. The precious remnants of the original ink stones were just enough physical and documented information for the color and the characteristics of the inks, so that Noodler's Ink could offer a sample of the Emperor's Ink - as close a replica to that royal ink as ever offered. The ink is specifically designed for fountain pen use, but is also used by artists, calligraphers and other craftspeople. It does require a more rigorous cleaning and maintenance regime or it may have a tendency to clog.