Some ancient Greek pottery terminology today. Pretty interesting how they found out these things to make their pottery art.
Black-figure Pottery
One of the styles of painting on antique Greek vases that leaves black figures (after oxygen withdrawn in kiln)
Red-figure Pottery
One of the styles of painting on antique Greek vases that leaves red figures (after oxygen added in kiln after it was withdrawn to create black-figures)
Vitrify
Convert (something) into glass or a glasslike substance, typically by exposure to heat