Margaret Young-Sanchez, Associate Curator of Art of the Americas, Africa, and Oceania in The Cleveland Museum of Art, explains that most Nok ceramics were shaped by hand from coarse-grained clay and subtractively sculpted in a manner that suggests an influence from wood carving. After some drying, the sculptures were covered with slip and burnished to produce a smooth, glossy surface. The figures are hollow, with several openings to facilitate thorough drying and firing. The firing process most likely resembled that used today in Nigeria, in which the pieces are covered with grass, twigs, and leaves and burned for several hours.