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BSE micrographs of the polychrome transparent glazes analysed showing: a) detail of a cross section of a yellow and brown glaze showing kentrolite particles (marked with an arrow), unmelted quartz and K-Pb feldspars at the ceramic interface; b) the rare occurrence of tin oxide (or tin and antimony) particles in the transparent glazes; c) the presence of a large agglomerate of tin oxide particles in sample Chi 26; d) an iron slag inclusion in sample Chi 3
