  This paper investigates the use of Optical Coherence Tomography (OCT) and
Short-wave Infrared (SWIR) spectral imaging to study the deterioration of a
Limoges enamel panel. Limoges enamels are formed of glass layers applied on a
metal substrate and are prone to glass disease. However, the level of
deterioration in Limoges enamels is generally difficult to assess visually. In
this study, SWIR was used to produce a hydration level map of the enamel, which
was coupled with virtual OCT cross-sections. The study shows a good correlation
between levels of hydration and structural damage over the enamel panel.
Hydration mapping allows visualisation of structural damage across the entire
enamel in one image.
