The Surface Slim Pen has only ever been available in black, but a limited edition set of colorful Surface Slim Pens were ...

A pump within the pen subsequently mixes the inks together in order to reproduce that color. The Colorpik Pen is 205 mm long by 21 mm wide (8 by 0.8 in) and weighs 48 grams (1.7 oz) Colorpik ...

They suggest instructors stop using red pens and go with a shade of blue instead. More information: Richard L. Dukes, Heather Albanesi, Seeing red: Quality of an essay, color of the grading pen ...

The Colorpik Smart Pen is equipped with a sensor that allows users to scan and store up to 16 million colors from real-world surfaces. It then mixes inks to recreate those colors for users to draw ...

These are the designated colors for marking a ballot ... The problem with counters using blue pens is the risk of a stray or intentional mark that could spoil the ballot, elections officials ...