More information provided by NAU American Southwest Virtual Museum:

Casa Grande Red-on-buff was the latest type of Hohokam Buff Ware produced and is most abundant in the Gila Basin.

Archaeological Culture: Hohokam

Date Range: ca. A.D. 1150-1300/1375

Construction: By paddle and anvil.

Firing: In an oxidizing atmosphere.

Temper: Sand-sized inclusions; little to no schist.

Surface Finish: Porous and non-porous; mica sometimes visible; buff or white slipped; can be unslipped brown; hand smoothed and tool polished. Slip, if present, is often thick, but flaky and pitted.

Paste Color: Buff, pink, peach, and near white.

Forms: Jars and pitchers with straight necks, mold inset shoulders, and occasional low Gila shoulders; pitchers may be diagnostic; bowls rare.

Decoration:

• Paint: Bright red, dull red, or purplish red.


• Pigments: Iron oxide mineral paint.


• Design: Open, simplified panel designs; small geometric elements in solid voids; panels of straight lines; chevron patterns; alternating wavy and straight lines; interlocking curvilinear and rectilinear scrolls and frets; thick line work; barbed or ticked embellishment on interior line. Jars tend to have two bands of design (large on body and small on neck); fields subdivided, with open space within the design field; primary designs on bowls are on the exterior. 


• Incising: None.

Key Traits: Vessel form (tall straight necks and mold inset shoulders; pitchers); neck designs; solid void motif.

Comparisons: Sacaton Red-on-buff jars lack neck designs and open space within the design field; pitchers are likely unique to Casa Grande Red-on-buff.

Oppelt (2007:125): Casa Grande Red-on-buff (AD 1150-1450). This type shows a shift to the use of banded layouts that are divided into fields on jar exteriors. There was also a tendency to leave open space within the design field. Common motifs were multiple straight or wavy lines with barbed or ticked embellishment on the interior line. Common elements are parallel hatched, interlocking scrolls grouped into design fields which were combined into a wide band encircling a jar from near the rim to below the low shoulder. This type was formed by the paddle and anvil method and fired in an oxidizing atmosphere. The surface color is buff to orangish pink. Casa Grande has a thick chalky slip that tends to flake off and cause pitting. The forms of this type are jars and pitchers only. Jars are by far the most frequent form. The mineral paint on this type is faint red, almost brown and very fugitive. Casa Grande Red-on-buff is most abundant in the Gila Basin.