ware, much of which was imported before the US
Food and Drug Administration FDA. began
monitoring lead and cadmium in imported wares.
Semivitreous dinnerware earthenware. and
porcelain dinnerware differ considerably in their
chemical constitutions and physical properties.
Earthenware bodies are made of common clays,
mixed with small amounts of light-burning clays
and fired at temperatures not much higher than
10008C Rhodes, 1973.. The bodies are then covered
with wet glaze and refired at approx. 10508C.
The glaze and body are not heated enough to
cause them to fuse and no glassification, or vitrification,
of the body occurs.