Writing materials. Archaic supports

In this video prof. Ana B. Sanchez-Prieto describes the materials that have been utilized as a support for writing, excluding papyrus, parchment and paper, that will be dealt with in other videos.
The script can is freely available in:
www.academia.e...
This video has been sponsored by:
Les Enluminures (www.lesenluminures.com)
Kremer-Pigmente (www.kermer-pigmente.com)
Orbis Medievalis (www.orbismedievalis.com)
There is an Spanish version for this video in • Soportes materiales de...