Calibri, Verdana, Arial and Sans Serif were next, followed by Trebuchet, Tahoma and Franklin Gothic Medium. Century Gothic uses about 30 percent less ink than Arial.

Some tests by printer.com, via a post on CNET's Digital Media blog, found that the use of the 10-point Century Gothic font is 31 percent cheaper than using the default 11-point Arial font.

Century Gothic is apparently even more economical than a well-known "eco-font", and when printer ink can cost US$10,000 a gallon it's a great eco-friendly initiative that not only helps the planet ...