"Print Clock" Technique May Change Dating Methods

Blair Hedges, a biology professor at Penn State, has discovered a new method to date printed materials. The "print clock" technique uses statistical formulas to analyze fades and page breaks.

Hedges' new method was published recently in the British research journal Proceedings of the Royal Society A: Mathematical, Physical, and Engineering Sciences. It was used to analyze 16th and 17th century books and maps.