250ml Finest writing ink and fountain ink for calligraphy, fountain pens and quills You've got something to say. Nothing trivial. They are focused and individual, their words have weight. You can also see that in their documents. Writing with OCTOPUS FLUIDS inks is writing for enthusiasts. Set accents with brilliant filler inks from Octopus Fluids GmbH & Co. KG. Our demands on our inks are high: pleasant shading, low plumage and optimal drying time enable fast writing and a soft, smooth pen. Our Octopus FLUIDS inks are not only available in the well-known royal blue or black, but are now available in many different shades of color.