Glass fountain pens, always more of a novelty item than a practical tool for everyday use, are making a comeback as young artists experiment with picturesque appearances and inks of various hues.

The duo who call themselves DFT draw familiar objects like trainers, animals, and hands – while never taking their pens off the paper. The artists can spend months conceptualising a single project.

You've probably doodled with one of these in class: a blue Bic pen. But when Oscar Ukonu uses ... Hatching is a common artists' technique used in drawing to create tones and shading using closely ...