In order to prevent the clay prone and cling to the work surface, pottery usually pill some materials (ash, sand, dusted clay, etc.), through which it is placed clay dough, similar to the method of mixing the flour test. Primets are added over clay mass. Then the dough flesh. Archeologically, it is impossible to distinguish this added materials of the primer. The process of mixing the mass can be repeated several times: muddy clay mixes with water, flesh, and then crumbles again and the entire process is repeated. Traditional potters know that the mass is usually the most common feeling. Besides, that would check that the mass of good consistency, take a small clump of clay and press it tilted between fingers and then thrown to check “stickiness” (i.e., plasticity), and a little masses rub through the tongue to check the “roughness” (i.e., the presence of an admixture).