How do art restorers transfer paintings from one medium to another?

Question

For example, Goya’s “[Black Paintings](https://en.wikipedia.org/wiki/Black_Paintings)” were originally murals painted on the walls of his home, but were later transferred to canvas. How did they do that?

In: 48

Answer 1

Link is to a video from Baumgartner Restoration. In this one, he transfers a painting on paper mounted to wood to an a acid-free board. Great channel with amazing explanations of technique!