These images complement the collection of digital images of ceramics of known recipe (Laboratory-Prepared Specimens). For each group of archaeological ceramic sherds, thin sections (30 µm) were prepared using a blue-dyed epoxy to attach specimens to glass slides. These were then scanned in a high-resolution film scanner (for coarse-grained ceramics a Plustek OpticFilm 7600i, optical resolution 3600 x 3600 ppi, 7 µm/pixel and for fine-grained ceramics a Plustek OpticFilm 120, optical resolution 5300 x 5300 ppi, 5 µm/pixel), making the entire thin section visible. Sand grains appear white and pores blue. Protocols for identifying area percentage of sand and pores were developed using Image-Pro Premier software by Media Cybernetics. Users can download images to replicate our protocols or develop new ones with other image analysis software.
A full discussion of our protocols for image analysis of pores in ceramic thin sections is found in: Reedy, C. L., Anderson, J. & Reedy, T. J. Quantitative porosity studies of archaeological ceramics by petrographic image analysis. In: P. Vandiver, W. Li, C. Maines, & P. Sciau, eds. Materials Issues in Art and Archaeology X. Cambridge: Cambridge University Press, doi: 10.1557/opl.2014.711 (2014).
This work was supported by National Science Foundation grants 1005992 and 1339530.
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