„How to make Stone Age adhesive using the double vessel method. Actually we don´t know how Stone Age people made their pitch because we never found any containers yet, even though Neanderthal man made and used birch pitch some 70 ky ago. But the double vessel method is ascertained for Medieval times, and the required equipment was also available to Stone Age crafters.“

Dauer: 6:57 Min.

Link: https://www.youtube.com/watch?v=rSk10RYnwCg