Antiquities returning to Mexico include Mayan vase sold for $4 in US store

[2naSalit]

5. You kind of have to...

Have a lot of stuff to glaze with terrasig, it takes days on a power mill to make each color. But the end results are uniquely fabulous.

The black on black is either terrasig application or a surface treatment (burnishing) for the shiny parts and unburished for the matte. What makes it black is manner in which it is fired, reduction process, by snuffing out the fire abruptly and letting the fire go out under the heap, dig your stuff out when it's cooled. By robbing the fire of oxygen, it causes the remaining oxygen to rush out of the clay and is replaced by carbon and it all comes out black.

Did Raku too, that's fun at night!