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Physical aspects of conservation

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thesis
posted on 10.05.2018 by Polyxeni Agapaki
This thesis is concerned with comparing and contrasting different cleaning techniques of 3-D artifacts. Conventional cleaning techniques such as chemical, steam and mechanical have been applied on several objects at the Inorganics and Sculpture Conservation Division in the National Museums and Galleries on Merseyside in Liverpool. A Q-switched Nd:YAG laser system has also been developed for practical use in conservation and cleaning tests carries out on a variety of samples. The results have been recorded and compared with those obtained using conventional techniques. It was found that short laser pulses (~10ns) at 1064nm were the most adequate for the removal of black dirt layers from marble and limestone. The surface of the stone was not physically or chemically modified and the cleaning process was self-limiting, thus allowing the controlled removal of the aesthetically displeasing and structurally damaging crusts. Photographic evidence before and after treatment is also presented. Application of water before irradiation was found to improve the efficiency of dirt removal and a model concerning the involved physical mechanisms during laser cleaning has been proposed.

History

School

  • Science

Department

  • Physics

Publisher

© P. Agapaki

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Publication date

1994

Notes

A Master's Thesis. Submitted in partial fulfilment of the requirements for the award of Master of Philosophy at Loughborough University.

Language

en

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