I bought a little glass pot of this ink powder from a local antique dealer about a year or so back and have been monkeying with different concentrations. It's a versatile ink depending on how dark you want it to be. I have always mixed it in small plastic needle bottles with distilled water (other than the time I used tap water as an experiment, which resulted in an odd green tint to the ink). It dries well, lubricates well, and has a unique look. http://imgur.com/1cLvweS