Synthesis and structural studies of face engobe layer's mass

Mongolia has less raw material resources for the face brick, only a few of clay deposits (2-3) located far from the main consumers. We have a few one layered face brick industry, which have difficulty to make good face materials. So, we did the studies for obtaining two layered face brick technology using the mass of simple milted clay, by-product of metallurgy and mining factory, limestone and brakeage of glass. We worked out a technology of obtaining an engobe layered color brick and fixed an appropriate recipe of basic and engobe layer's mass for sintering dark and light brown color. We put forward a hypotheses about the color of mass in the manner of idiochromatic or to cause of self-coloring crystallizing of the face and basic layer's color; and in the manner of allochromatic or being a colorful ingredient to make a direct influence to the mineral's and material's color.