An curved arrow pointing right. Watch full episodes of the Science Channel series "How It's Made" on the Science GO app or at: http://insder.co/HowItsMade More from ...

Without further ado, we’ve curated a selection of the best highlighter pens to supercharge your studies below. Shop now The Swiss-German stationery expert’s brightest and most long-lasting ...

[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.

To understand how this works in highlighter pens, we can compare them to ordinary ballpoint pens. When light hits the ink of a blue pen, the ink reflects blue light and absorbs other colours ...