This research is the study of science and engineering properties of clay bodies and glaze for earthenware product of Kangpao village, Lomkao district, Phetchabun province. The purpose is to study science and engineering properties of clay bodies for pottery production. To study the wisdom coating clay for color of products as needed. And to study and develop a coating to suit the clay of Ban Kaeng target. Results of the tests in science and engineering of clay for pottery found clay for pottery production target Kaeng Lom Kao district. Phetchabun Province The microstructure of clay plates stacked upon each other. The threshold values liquefied percentage of 90.85 and the plastic limit of 30.26 value% Clay is equal to 34.61% and the% Silt fighting took less than% Sand by the% Silt and% Clay is well underway. 35-36%, which is enough to conclude. Ban Kaeng of clay targets are mostly broken clay granules. The sand is mixed into it because it is part of the precipitation that caused the blow caused a heap of soil in this area. The educational attainment coating clay for color products according to the wisdom of the clay coating of Ban Kaeng target. RHA is bringing the mill. Ash from burning sawdust And ashes from the burning of rice straw. The ash has made each of four different coatings. The ash contains chemical plant is mostly silica, alumina, sodium, potassium, calcium, magnesium and ferric oxide. These will vary depending on the type of ash. The study and develop a coating to suit the clay of Ban Kaeng targets that the development of the most appropriate coatings and coating products include pottery, atmospheric oxidation RHA scrap granite escalope. Provides color with dark brown pottery products. Coating semimatt and semi-porous it.