
Ceramics is unique among hobby crafts, since no other form of creative endeavor allows the unlimited choice of decorating possibilities with the basic materials. This chapter and several of those to follow, entitled "Surface Alteration," will explore some of the techniques which can be used to change the surface of a basic piece of greenware in some way. These changes, or alterations, may be brought about by the addition of clay to a surface, as well as the removal of the basic surface by various means.
The alteration of the surface of ceramic ware has intrigued potters for centuries, and many examples of various types of added ornamentation can be found in museums throughout the world. The Pennsylvania University Museum has on display a basic jug which was turned into an animal shape on wheels by the whimsical addition of head, legs, etc.; most likely intended as a child's toy, this piece has been dated to the first dynasty of Ur (3100 B.C.). Another example of surface alteration is the famous "Harvester Vase" from the late Minoan period (1600 to 1100 B.C.), which is richly carved with many human figures. During the Tang period of China (618-906 A.D.), many superb pieces were decorated by the applique of intricate clay designs, and throughout the great Ming period (1368-1644) extensive use was made of surface alteration in the form of carving, piercing, slip trailing and clay attachments. All of the techniques used for centuries to alter the surfaces of clay ware can be used to advantage by the hobbyist of today, to further the enjoyment of ceramics.
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