Laser cleaning of metals

Laser Conservation: Metals - Conservazione laser: Metalli

When it comes to artefacts of artistic and archaeological interest, the laser can be used for the conservation of a wide variety of metals. A few years ago, a particular type of laser was developed by National Research Centers to remove oxidations and superimposed patinas from gilded bronze surfaces. From these first experiences the applications have spread: lasers have been employed also in the restoration of large monumental complexes directly on the bronze and copper surfaces, allowing to preserve the original patinas as the details of the workmanship.

METALS

In combination with some solvents, it is also a valid tool for cleaning silver artifacts of archaeological origin. Here, as in the case of gilded surfaces, the high reflection of the metal surface is exploited.

In combination with some solvents, it is also a valid tool for cleaning silver artifacts of archaeological origin. Here, as in the case of gilded surfaces, we exploit the high reflection of the metal surface.

More specifically, when it comes to iron artefacts it is preferable to use the new active fiber lasers for rust removal. Furthermore, the local thermal treatment causes the conversion of hydrated oxides into anhydrous oxides, thus making the surface more resistant and slowing down any subsequent degradation actions.