This is quite possibly the most over-engineered pen I've ever come across, and it looks like it's straight out of a spycraft lab. The Hancept Zero Mk2 is a 2-mm-thick contraption that can slip ...

No stationery case is complete without an array of pens, correction fluid and highlighters. From marking up notes to adding a pop of colour to doodles, the eye-catching ink is a sure way to make ...

[Emily] set about gutting several highlighter pens and squeezed out the ink reservoirs into a ladle. The printer’s ink cartridge was then filled with the fluid, and a test print was fired off.