Ralph Nader has a problem. After using his beloved Paper Mate Flair felt-tipped pens for more than 30 years, Nader noticed a change: His pens have been drying out faster than ever. He reached out ...

Ask someone to write you a note on some absorbent paper using one of the felt-tip pens you intend to test (don't let them tell you which one). Ensure that the note contains an inky dot ...

[Mike Davey] built this one using servo motors, a Parallax Propeller, felt-tipped pen, and 1000 feet of film leader. The machine writes characters to the leader, reads them using a grayscale ...