Information provided by American Southwest Virtual Museum:
Jeddito Black-on-yellow was produced primarily on Antelope Mesa and Third Mesa in the Hopi area, but like other Jeddito Yellow Ware types, is found as a trade ware in northern, central, and east-central Arizona.

Archaeological Culture: Ancestral Puebloan, Hopi

Date Range: A.D. 1325 to 1600.

Construction: By coiling.

Firing: In an oxidizing atmosphere.

Core Color: Generally yellow; pinkish in some specimens.

Temper: Fine quartz sand rarely visible to the naked eye; occasionally reddish angular fragments; sand temper rarely visible without a hand lens either in cross-section or on vessel surfaces.

Surface Finish: Smooth, highly polished and compacted; occasionally few minute whitish or yellowish flakes visible on the surface, but not in cross-section.

Surface Color: Cream to bright yellow (yellow predominates); over-fired specimens orange or metallic; surface and core do not contrast.

Forms: Bowls, jars, and dippers.

Vessel Thickness: 3.7 to 10 mm, average 6.1 mm (bowls); 4.3 to 9 mm; average about 6.5 mm (jars).

Decoration:
Paint: Black.
Pigment: Iron-manganese.
Design: Geometric; occasionally life forms. Bowl interiors and jar exteriors always decorated; bowl exteriors sometimes decorated; flared lips on jars sometimes painted on interior.

Comparisons: Awatovi Black-on-yellow, which has less homogeneous paint, temper, and core color; Jedditto Stippled, which has splattering or sponge-like paint applications; Jeddito Engraved, which has designs engraved into the paint; and Paayu Polychrome, which uses different paint densities to achieve more than one color.

Other Names: Polished decorated ware, Yellow Ware, Buff Ware, Jeddito Yellow, Jeddito Yellow Ware, Jeddito Brown-on-Yellow.

Information provided by Oppelt (2007:63-64):
Jeddito Black-on-yellow (AD 1350-1450)
The attractive vessels of this type were traded over much of the Ancestral Pueblo region. The surface is smoothed and usually highly polished. The color is bright yellow to cream, and the forms are bowls, jars and dippers. The black paint is manganese. The designs on the bowl interiors are geometric with a broken band below the rim. Occasionally there are life forms. The center of production of this type is on the Hopi Reservation.

Jeddito Stippled, synonym: Jeddito Black-on-yellow Stippled, AD 1350-1600
This type is identical to Jeddito Black-on-yellow except for the addition of stippling in
the design.

Information provided by Dean Wilson 2013 - Southwest Ceramics Typology Project:
Pottery that would now be defined as Jeddito Black-on-yellow was first described by Fewkes (1898) and defined by Hargrave (1932). Jeddito Black-on-yellow exhibits decorations in black iron-manganese paint over a yellow surface (Colton and Hargrave 1937; Hays 1991; Lyons and Hays-Gilipin 2001; Smith 1971). Jeddito Black-on-yellow appears to have been produced from about A.D. 1300 to 1600. This type was produced in the Hopi villages, primarily on Antelope and Third Mesas but was traded extensively across much of the Southwest.

Surface and paste are often a creamy show color although some examples may be buff or orange and indicate consistent firing in an oxidizing atmosphere. Temper consists of very fine quartz sand that seem to represent particles naturally occurring in the clay. Decorated surfaces are not slipped and are usually well-polished. Vessel walls are often thick. Vessel forms mainly consist of bowls and ladles, with jars being much less common. Bowls are sometimes decorated on both the interior and exterior surface. Vessels are very hard, well fired, and shatter when broken. Painted decorations are applied in an iron-manganese pigment that ranges from black to brown in color. Designs are applied to jar exteriors and bowl interiors and exteriors. Designs mainly consist of stylized life forms composed of geometric forms. Paint spattering is common on the decorated surface. Designs are often open but with more compact black elements which often include squiggle lines and filled circular motifs. Overall quality of execution of designs varies greatly. Varieties of this type have sometimes been defined based on additional decorative treatments and include Jeddito Stippled and Jeddito Engraved.