Although the market for hand-drawn portraits largely collapsed ... which provides just enough pen-to-paper pressure to reliably draw lines without lifting off or scratching the paper.

Instead of a mouse, a digital pen provides a very natural way to hand write and hand draw into ... Digital pens use a digital paper technology developed by the Swedish Anoto Group.

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.