Fountain pens are known for their sophisticated ink delivery system and smooth writing. Today’s modern fountain pens usually use dye-based inks rather than pigment-based inks. Dye-based ink mixes like sugar and water, while pigment-based ink mixes like sand and water. Using a dye-based ink prevents pigments from clogging the narrow passages of the fountain pen’s ink delivery system. Popular brands for the smoothest-writing engraved fountain pens include Waterman and Parker.