San Ildefonso pottery Maria Martinez accommodated the tastes of the wealthy collectors and tourists in new productions based on traditional methods and forms, but also contemporary in appearance. Her distinctive black pots, which resulted from experiments with firigin and glazes, attracted many collectors, and soon she and her husband, Julian, produced the famous black-on-black ware almost exclusively.
— Revised from J. Barter, Window on the West (2003), pg. 129