|Monthly Tech-Tip |
#6 Tile kaolin is a "designer kaolin", they add bentonite to the material during manufacture to increase the plasticity far beyond what mother nature can make. This vase is made from the pure kaolin, it is very thin-walled and light, this would be impossible with almost any other kaolin. The fired colour is darker than some other North American kaolins but much less of this and less added bentonite is required in a recipe to get the same plasticity. Thus, in the end, a plastic porcelain body can often fire just as white using this as other whiter burning kaolins.
Tile #6 Kaolin
Plasticity (in ceramics) is a property exhibited by soft clay. Force exerted effects a change in shape and the clay exhibits no tendency to return to the old shape. Elasticity is the opposite.