Indigraph Steel Fountain pen EF : This pack includes the Indigraph Pen (conv erter included) with steel Nib and 4ml of Indigraph Indian ink. It is an innovative fountain pen that differs from the rest because of a unique advantage: its ability to keep the nib constantly moist, preventing the inks from drying out. How does it achieve this? Using the advanced IndiGraph technology, a water reservoir is provided in the upper part of the pen cap, separated by a custom-designed membrane, which allows the passage of moisture – but not water – and stops the nib from ever drying out. IndiGraph , allows the use of Indian inks. What’s special about this? While using this type of ink, when the ink dries, a waterproof film of shellac is created which protects the drawing from water, making it ideal for working with watercolours or inking comics, among other graphic arts.