What is an Ecofont?

In the latest issue of “O” magazine I saw a note about a “Green” font that uses 20% less ink when printed.    It suggested trading in “Arial” for the more eco-friendly “Ecofont” so I checked it out. The picture illustrates how the Ecofont was created by omitting parts of the letter. At the shown size, this obviously is not very nice, but at a...