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Grain size analyses in tin-lead glazes based on 2d-sections

A problem in the archaeometric classification of Catalan Renaissance pottery is the fact, thatthe clay supply of the pottery workshops was centrally organized by guilds, and thereforeusually all potters of a single production centre produced chemically similar ceramics.However, analysing the glazes of the ware usually a large number of inclusions in the glaze isfound, which reveal technological differences between single workshops. These inclusionshave been used by the potters in order to opacify the transparent glaze and to achieve a whitebackground for further decoration.In order to distinguish different technological preparation procedures of the single workshops,at a Scanning Electron Microscope the chemical composition of those inclusions as well astheir size in the two-dimensional cut is recorded. Based on the latter, a frequency distributionof the apparent diameters is estimated for each sample and type of inclusion.Following an approach by S.D. Wicksell (1925), it is principally possible to transform thedistributions of the apparent 2D-diameters back to those of the true three-dimensional bodies.The applicability of this approach and its practical problems are examined using differentways of kernel density estimation and Monte-Carlo tests of the methodology. Finally, it istested in how far the obtained frequency distributions can be used to classify the pottery

Geologische Vereinigung; Institut d鈥橢stad铆stica de Catalunya; International Association for Mathematical Geology; Patronat de l鈥橢scola Polit猫cnica Superior de la Universitat de Girona; Fundaci贸 privada: Girona, Universitat i Futur; C脿tedra Llu铆s Santal贸 d鈥橝plicacions de la Matem脿tica; Consell Social de la Universitat de Girona; Ministerio de Ciencia i Tecnolog铆a.

Universitat de Girona. Departament d鈥橧nform脿tica i Matem脿tica Aplicada

Manager: Mateu i Figueras, Gl貌ria
Barcel贸 i Vidal, Carles
Other contributions: Universitat de Girona. Departament d鈥橧nform脿tica i Matem脿tica Aplicada
Author: Schwedt, A.
Buxeda i Garrig贸s, Jaume
Madrid Fern谩ndez, Marisol
Abstract: A problem in the archaeometric classification of Catalan Renaissance pottery is the fact, thatthe clay supply of the pottery workshops was centrally organized by guilds, and thereforeusually all potters of a single production centre produced chemically similar ceramics.However, analysing the glazes of the ware usually a large number of inclusions in the glaze isfound, which reveal technological differences between single workshops. These inclusionshave been used by the potters in order to opacify the transparent glaze and to achieve a whitebackground for further decoration.In order to distinguish different technological preparation procedures of the single workshops,at a Scanning Electron Microscope the chemical composition of those inclusions as well astheir size in the two-dimensional cut is recorded. Based on the latter, a frequency distributionof the apparent diameters is estimated for each sample and type of inclusion.Following an approach by S.D. Wicksell (1925), it is principally possible to transform thedistributions of the apparent 2D-diameters back to those of the true three-dimensional bodies.The applicability of this approach and its practical problems are examined using differentways of kernel density estimation and Monte-Carlo tests of the methodology. Finally, it istested in how far the obtained frequency distributions can be used to classify the pottery
Geologische Vereinigung; Institut d鈥橢stad铆stica de Catalunya; International Association for Mathematical Geology; Patronat de l鈥橢scola Polit猫cnica Superior de la Universitat de Girona; Fundaci贸 privada: Girona, Universitat i Futur; C脿tedra Llu铆s Santal贸 d鈥橝plicacions de la Matem脿tica; Consell Social de la Universitat de Girona; Ministerio de Ciencia i Tecnolog铆a.
Document access: http://hdl.handle.net/2072/14710
Language: eng
Publisher: Universitat de Girona. Departament d鈥橧nform脿tica i Matem脿tica Aplicada
Rights URI: http://hdl.handle.net/10256/691
Subject: Arqueometria
Title: Grain size analyses in tin-lead glazes based on 2d-sections
Type: info:eu-repo/semantics/conferenceObject
Repository: Recercat

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