发现达芬奇(4)

We didn't know that Leonardo worked on vellum.

But once I'd started looking at Leonardo and vellum, which is basically parchment.

It's from a calf or kid, in this case or a sheep.

It's animal skin.

We've got no drawings about Leonardo on vellum on animal skin.

But once you start looking at Leonardo you can find references in his interest to this as a medium so that becomes important.

And all these things add up so there's no point at which you say that is absolutely it.

Interviewer: I think the point about it being vellum is really interesting.

And I wondered if because there's no other works that we know of which Leonardo worked on vellum, it made a difference in terms of attribution according to technique?

Whether he's using a different technique here because of the material, or if that made harder?