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Removal of Graffiti from Morelia’s Quarry Stone by High Power Diode Laser

Published online by Cambridge University Press:  22 May 2014

A. Sánchez-Castillo ,
F. Quintero ,
M. A. Espinosa-Medina ,
G. Carbajal-De la Torre ,
J. M. Pou-Saracho ,
F. Lusquiños-Rodríguez ,
M. Ortiz-Ruiz  and
A. B. Martínez-Valencia
A. Sánchez-Castillo
Affiliation:
Facultad de Ingeniería Mecánica, Universidad Michoacana de San Nicolás de Hidalgo, Av. Fco. J. Mujica, 58066 Morelia, Mexico. e-mail: amadeofin@gmail.com
F. Quintero
Affiliation:
Departamento de Física Aplicada, Universidad de de Vigo, E.I. Industriales, Campus Lagoas-Marcosende, 36310. Vigo, Spain.
M. A. Espinosa-Medina
Affiliation:
Facultad de Ingeniería Mecánica, Universidad Michoacana de San Nicolás de Hidalgo, Av. Fco. J. Mujica, 58066 Morelia, Mexico. e-mail: amadeofin@gmail.com
G. Carbajal-De la Torre
Affiliation:
Facultad de Ingeniería Mecánica, Universidad Michoacana de San Nicolás de Hidalgo, Av. Fco. J. Mujica, 58066 Morelia, Mexico. e-mail: amadeofin@gmail.com
J. M. Pou-Saracho
Affiliation:
Departamento de Física Aplicada, Universidad de de Vigo, E.I. Industriales, Campus Lagoas-Marcosende, 36310. Vigo, Spain.
F. Lusquiños-Rodríguez
Affiliation:
Departamento de Física Aplicada, Universidad de de Vigo, E.I. Industriales, Campus Lagoas-Marcosende, 36310. Vigo, Spain.
M. Ortiz-Ruiz
Affiliation:
Facultad de Ingeniería Mecánica, Universidad Michoacana de San Nicolás de Hidalgo, Av. Fco. J. Mujica, 58066 Morelia, Mexico. e-mail: amadeofin@gmail.com
A. B. Martínez-Valencia
Affiliation:
Facultad de Ingeniería Mecánica, Universidad Michoacana de San Nicolás de Hidalgo, Av. Fco. J. Mujica, 58066 Morelia, Mexico. e-mail: amadeofin@gmail.com
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Abstract

The historical monuments such as cathedrals, public buildings and so on, are a fundamental part of artistic heritage of a country. They reflect, ultimately, much of its culture and history. For several decades, their aspect has been seriously changed by graffiti, which clearly endangers their preservation state and causes loss of their esthetic appearance and historic value. This damages seriously the self-esteem of residents who witness the continued and strong degradation of their cultural heritage. The aim of this work is to study the removal of graffiti from a characteristic stone which is used in Morelia (México) as the raw material for architectural monuments, using a high power diode laser treatment. We concluded that continuous wave regime leads to better results than modulated wave regime; additionally, a two laser passes process demonstrated a high performance.

Keywords

laser ablationsurface reactionenvironmentally benign
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1618: Symposium 8A – Cultural Heritage and Archaeological Issues in Materials Science , 2014 , pp. 263 - 270
Copyright
Copyright © Materials Research Society 2014 

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References

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