All three images: Gabriel Campanario
Like Calligraphy, a paper is required that is smooth and strong enough to withstand the various pen and ink tips available. Pen & ink traditionally means using a dip-style pen where papers were required to be more durable, but modern tools with ball points and felt tips are more forgiving. Some sizing is necessary to prevent the ink from bleeding, but not too much so that the surface is too hard and the ink smears or feathers.
