Use of the Coal Ash in Ash Glazes at 1200°C

In literature researches, it was observed that the ash glazes which had been discovered by coincidence in China, have been using approvingly by many contemporary ceramic artists because of their structures and aesthetic values. Ash glazes that have been used very commonly both in Japan and America have been lately applied as artificial ash glaze bodies as well as natural plant ashes. What have been observed in these researches is that the glaze effects that are acquired from glazes that are made of plants have a similar effect with the glazes acquired from coal and raw materials.

This is the main reason of selecting the imported lignite coals in 1200°C glaze structures which are offered in 25 kg bags and used in domestic accommodations for heating. Different glaze recipes in which coal ash is increased step by step with different fluxes are prepared. The surface effects and colour characteristics have been determined. In this research, similar surface effects to natural ash structures have been acquired and also the colour effects varying from bright yellow to dark brown have been observed.