New Imaging Methods to Improve Text Legibility of Ostraca

Abstract

We report on experiments on three new methods to improve text contrast for carbon ink ostraca. These are (1) Raman imaging, (2) Micro-focus XRF scanning and (3) exogenous contrast agents either to enhance the X-ray signal or create an optical fl uorescence signal. We tested all three methods with modern ‘stunt’ ostraca, made using a variety of carbonbased inks. In each imaging modality, the inks are clearly differentiated from the clay background. The exogenous contrast enhancement, in particular, suggests a variety of approaches to improving text legibility.