black pottery originated in San Bartolo Coyotepec in the 1950s
when potters started innovating in order to spur lagging sales
after the introduction of plastic. Black pottery is for decorative
purposes only: it will not hold water like the traditional grey
Bartolo, you can see potters at work in the traditional manner.
This is the way they have worked for thousands of years - only
the manner in which the pots are fired has changed.