Art UV examination

In the field of art, several different wavelengths of lighting are used. One of this wavelengths is typical UV light 365nm.
UV light can be useful in many applications
You can help reveal the changes or restore the original to its previous state.
Discrepancies reveal paintings, corrections, signatures, modifications.
Identification of the separation of modern dyes and previously used dyes. Usually modern paints shine intensely under UV light.
The status of the repairement could be checked with UV light too.