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SUMMARY:Optical properties of high-fired glazes: composition\, application
  methods and colouring agents (iron\, titanium and copper) - Trinitat Prad
 ell (Universitat Politècnica de Catalunya)
DTSTART:20250613T121500Z
DTEND:20250613T130000Z
UID:TALK231691@talks.cam.ac.uk
CONTACT:Qin-Qin Lü
DESCRIPTION:High fired lime and lime-alkali glazes produced in China are h
 ighly appreciated for their aesthetical appearance. \nThe presentation wil
 l explore some of the most debated questions surrounding Changsha ware a T
 ang dynasty (9th−10th centuries) Chinese stoneware\, renowned for its po
 lychromy and pioneering high-temperature red glaze. In particular the foll
 owing topics will be addressed: the coexistence of transparent and opaque 
 glazes\, the overglaze or underglaze application of the decorations\, the 
 coexistence of oxidised green and reduced red copper designs on the same o
 bject\, the origin of the first high-temperature copper reds and their dis
 continuity\; and on the reason for the development of either green or turq
 uoise colours.\nThe underlying reasons for the opalescent blue sky-like ap
 pearance of Jun ware glazes\, a late Northern Song dynasty (12th century) 
 ware\, a subject of many studies and much debate will also be presented. \
 nWe will show how\, in both cases\, the nano- and microstructures present 
 and the iron\, titanium and copper speciation in the glaze are responsible
  for the opacity and colouration. Finally\, we will show how an adequate s
 election of the glaze composition and thickness in conjunction with the fi
 ring conditions\, is responsible for them.\n\nBio:\n\nTrinitat Pradell is 
 a Materials Scientist specialist in amorphous and nanostructured materials
 . She has been working on the analysis\, production technology and conserv
 ation state of Historical-Artistic materials\, contributing data to Histor
 ical research for the last 30 years. She studied Fundamental Physics at th
 e University of Barcelona obtaining her Ph.D. in 1992. She did some postdo
 ctoral studies in the Institute of Advanced Materials (Petten\, Holland) a
 nd enjoyed a sabbatical in the University of Oxford (UK) collaborating wit
 h prof. M.S. Tite.  She became associate professor an joined the Materials
  Characterisation group in the Physics Department in 2002. She obtained th
 e full professorship in 2010.\n\n\nPlease join us in-person in the McDonal
 d Institute seminar room or join online.\n\nhttps://teams.microsoft.com/l/
 meetup-join/19%3ameeting_ZDc2MDk1ZGQtNmNkZC00M2U2LTliYjMtN2EyZWE0MDI5ZTAz%
 40thread.v2/0?context=%7b%22Tid%22%3a%2249a50445-bdfa-4b79-ade3-547b4f3986
 e9%22%2c%22Oid%22%3a%227c42dde3-f200-49ed-9a81-5aa7e67f945e%22%7d\n
LOCATION:Seminar Room\, McDonald Institute for Archaeological Research\, D
 owning Site
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