Ceramic collections from archaeological sites dating to and before the early 19th century are often dominated by red-earthenware vessels used in the foodways complex. By the late 19th century, redware vessels are much less common in New England and the Middle Atlantic region. This decline in the use and production of red earthenwares has many causes, including decreased costs of alternative materials (stoneware, refined earthenware, metal, and glass) and an awareness of the harmful effects of lead glazes, but the most important factor is the change in food-preparation technology from open-hearth to stove cooking.
Janowitz, Meta F.
"Decline in the Use and Production of Red-Earthenware Cooking Vessels in the Northeast, 1780-1880,"
Northeast Historical Archaeology:
42, Article 7.
Available at: http://digitalcommons.buffalostate.edu/neha/vol42/iss1/7