H443

High temperature (CONE 10), slightly textured, plastic, semi-vitreous, iron-brown speckled, general purpose, native body for dark iron reduction fired stoneware.

H443 is a classic mottled-brown reduction speckled stoneware. Unlike H440, it generally fires with no red hues. H443 is not a vitreous body, it stops short of complete maturity to retain a variegated earthy color. It is best suited for decorative pieces large or small (vases, bowls, planters, etc.).

Process Properties

H443 is a reddish brown in pugged form and made totally from a blend of Plainsman native stoneware materials. It has good plasticity (exellent if it is stiffer) and exhibits only a slight sandy texture during throwing (by virtue of kaolinized sand in its recipe). H443 has an excellent distribution of clay particle sizes in the plus 325 mesh range and these are a factor in its fast drying and high dry density and strength. However, even though H443 dries well it does have a fairly high drying shrinkage and thus care and attention are necessary to be sure larger pieces, especially flat plates, shallow bowls, and sculptural ware are dried evenly.

For additional information please visit the Plainsman Clay Website here.