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TECHNOLOGY AND COLOUR DEVELOPMENT OF HISPANO‐MORESQUE LEAD‐GLAZED POTTERY
Author(s) -
MOLERA J.,
VENDRELLSAZ M.,
GARCÍAVALLÉS M.,
PRADELL T.
Publication year - 1997
Publication title -
archaeometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.716
H-Index - 67
eISSN - 1475-4754
pISSN - 0003-813X
DOI - 10.1111/j.1475-4754.1997.tb00788.x
Subject(s) - glaze , hematite , pottery , mineralogy , calcareous , materials science , metallurgy , chemistry , art , geology , ceramic , visual arts , paleontology
Lead‐glazed pottery from the medieval workshop of Les Olleries Majors (Paterna, Spain) has been studied by Mössbauer spectroscopy, X‐ray diffraction, X‐ray fluorescence and optical spectroscopy. Yellow, brown and honey‐coloured glazes occur on pots glazed on only one surface. They have virtually identical compositions and transmittance spectra, their apparent differences in colour are due to the colours of the underlying pastes. Yellow glazes occur on cream‐coloured calcareous bodies, honey‐coloured glazes occur on less calcareous bodies with some development of hematite, while brown glazes occur on red siliceous cooking‐pots. Green glazes are found on pots glazed on both surfaces; the glazes trapped CO 2 evolved by decomposing carbonates, resulting in an internal reducing environment. This caused the reduction of iron to the ferrous state which coloured the glaze green by diffusion.