Gray polychromes are found within many whiteware types. Many whiteware types may have an unslipped gray exterior, yet most researchers do not consider these polychromes because the gray is not painted or within the design field. A white painted band or design is not to be confused with "slip slop". "Slip slop" is where white slip may have gotten on a gray area intentionally or accidentally but is not a painted design. For example, many whiteware jars, ollas, pitchers, etc. have intentionally white slipped rim or neck interiors and many bowls have accidental "slip slop" on their exteriors. Redware jars, pitchers, canteens, etc., also often have slip along the inner rims and or necks as does the whitewares, but the gray or brown interiors of these vessels are not meant to be seen and is usually not part of the overall design scheme. See article titled: What is a Polychrome?
The following links are to a few pages with Gray Polychrome examples:
http://rarepotteryinfo.siteprotect.net/protect/ChacoVariantPolychrome.htm
http://rarepotteryinfo.siteprotect.net/protect/CibolaWhitewareVariantsSnowflakePolychrome.htm
http://rarepotteryinfo.siteprotect.net/protect/CibolaWhitewareVariantsSnowflakePolychrome.htm
