A Scientific Study of Late Islamic Blue-white Stonepaste Wares of Iran
In 2016 and 2018, a good number of blue-white stonepaste wares were discovered in a Qajar period pit adjacent to Tepe Naderi in Northern Khorasan province, Iran. 16 samples were subjected to Stereo Microscopy, Raman Spectroscopy, and Scanning Electron Microscopy. The compositional data and a selected set of images are included in the synonymous article submitted to the journal Archaeometry; The remaining images are placed here for the use of the readers.
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For physical and chemical properties, the 16 samples were analyzed at the Department of Conservation Science of the Palace Museum in Beijing, China. A small piece was cut from each sample for surface and cross-section examination. The small specimens were then mounted in epoxy resin, grounded, and polished following the standard procedure (Scott 1991: 72-73). The physical characteristics of the surfaces and cross-sections were defined with SZX16 stereo microscopy produced by Olympus of Japan. The chemical compositions of the bodies, pigments, and glazes were analyzed with TESCAN VEGA3 scanning electron microscopy, equipped with Bruker XFlash 610M energy dispersive X-ray at an accelerating voltage of 20KV. The cross-sections were coated with carbon before SEM-EDX analysis. The compounds of the pigments in the cross-sections were detected with Renishaw inVia laser confocal Raman spectrometer microscopy comprised of Leica DMLM microscopy equipped with Neon light as signal source, a 100x objective, a spectrometer with a 1800 grooves/mm grating and a NIR/UV enhanced, Peltier-cooled CCD camera. Spectrum region:100nm-6000nm. Spectral resolution precedes 1cm-1. Incident laser beam wavelength 532nm, laser power 280mW, laser power density 1%. Space solution < 0.5µm. Scanning time 10s, scan 10 times.