CLEAN : Art detectives probe what lies beneath a Fragonard

The video tutorial discusses advanced imaging techniques, including X-ray and hyperspectral IR cameras, used to analyze artworks. It highlights the discovery of hidden layers in Fragonard's painting, 'Young Girl Reading,' revealing a previous composition. The tutorial also covers conservation methods to uncover underdrawings and earlier paintings by minimizing light scattering and absorption by pigment particles.

What assumptions were made about the painting of the young girl reading?

How did Fragonard manage to paint a new head on top of the old head?