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Ultrafast Laser Cleaning of Daguerreotypes

Published online by Cambridge University Press:  12 April 2011

Michael J. Abere ,
Ryan D. Murphy ,
Bianca Jackson ,
Gerard Mourou ,
Michel Menu ,
John Mansfield  and
Steven M. Yalisove
Michael J. Abere
Affiliation:
Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan
Ryan D. Murphy
Affiliation:
Applied Physics Program, University of Michigan, Ann Arbor, Michigan Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan Center for Solar and Thermal Energy Conversion, University of Michigan, Ann Arbor, Michigan
Bianca Jackson
Affiliation:
Institut de Lumière Extrême, ENSTA, Paris, France
Gerard Mourou
Affiliation:
Institut de Lumière Extrême, ENSTA, Paris, France
Michel Menu
Affiliation:
Centre de recherche et de restauration des musées du France, Paris, France.
John Mansfield
Affiliation:
Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan
Steven M. Yalisove
Affiliation:
Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan Center for Solar and Thermal Energy Conversion, University of Michigan, Ann Arbor, Michigan
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Abstract

An ultrafast laser irradiation method for the removal of corrosion from Daguerreotypes without detrimentally affecting image quality has been developed. Corrosion products such as silver oxide and silver sulfide may be removed by chemical cleaning but these reactions are hard to control and are often damaging to the underlying silver, ruining the image. The Ti:Sapphire 150 fs laser pulses used in this study are focused to a beam diameter of 60 μm and are normally incident to the Daguerreotype. It was found that the corrosion layer has a lower material removal threshold than silver allowing for removal of corrosion with minimal removal of vital information contained in the silver substrate.

Keywords

laser ablationcorrosionthin film
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1319: Symposium WW – Materials Issues in Art and Archaeology IX , 2011 , mrsf10-1319-ww04-03
Copyright
Copyright © Materials Research Society 2011

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References

REFERENCES

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