The masks were first sculpted in clay, then cast in plaster. The masks were then made using a neoprene slip casting process. Multiple copies could be manufactured of each mask. Below is a picture of all of the masks primed and ready for painting:
All of these masks can now be purchased on my Etsy shop, JW Masks. Various other pictures of the masks can also be found on the site.
I also make traditional leather commedia masks. I studied leather mask making under Antonio Fava in the spring of 2016, and have created five leather designs to date. The pic below is of my very first leather mask design.