Sinter-engobes are supplemented by the addition of glass bodies. The surface is much harder and therefore less sensitive to mechanical impacts and scratches. In addition, the denser surface, similar to a glaze, provides a dirt-repellent effect. Our sinter engobes are diffused and are characterized by a silken matt luster. Due to increased glass body content, the degree of gloss of our frosted glazes approaches that of the brilliant glazes.