25.08.2014

Ultraviolet fluorescence and reflected ultraviolet examination

Ultraviolet fluorescence and reflected ultraviolet examination allows repairs, restorations and later retouching to be distinguished.

UV radiation has shorter wavelengths than visible light. Almost any painting analysis usually begins with UV examination. It is a quick and affordable test that can provide useful information and help to determine the next steps in analysis technique.

Reflected UV photography allows the conservator to examine the condition of the varnish layer and may also detect fungal growth.

UV fluorescence photography can reveal the presence of natural resin varnishes, It is also possible to identify any retouchings and over-paintings. For instance the authenticity of the original inscriptions or signatures can be confirmed in the UV fluorescence photography.