This SEM image shows the damage caused by exposing the sample to a mercury tungsten light source and cycling relative humidity.

This SEM image shows the damage caused by exposing the sample to a mercury tungsten light source and cycling relative humidity.

This SEM image shows the damage caused by exposing the sample to a mercury tungsten light source and cycling relative humidity. This was the closest match to the surface of the Mazarin Chest we were able to achieve in-house, but additional development of artificial ageing protocols was undertaken by PhD students associated with the project.