Book of Hours
Azurite was used in the majority of blue areas on every folio analysed, although the presence or absence of trace amounts of barium, zinc and arsenic suggest the use of different sources or batches of the same pigment. High amounts of barium impurities, in particular, characterise the images attributed to the Painter of Additional 15677. Ultramarine and smalt were identified on one folio each (fols. 15r and 14r respectively). Indigo was also detected in a minority of areas on several folios.