It’s a simple and effective idea – lighten up fonts to save on ink. The concept is to use fonts with letters and symbols with internal white spaces. When printed at fewer than 10 pt, they look full.
This method permits savings of as much as 20% less ink. This is not just favourable for the environment but also means a reduction in printing costs. This excellent idea could be applied to many font letters and symbols. In the meantime it can be tested out by using a variant of Vera Sans.