Formula of lime fly ash glaze

Plant ash. Plant ash glaze is called grey glaze, which, like earth glaze and lime glaze, is one of the earliest glazes used in ceramics. Because of its irreplaceable important characteristics, gray glaze is still used in daily-use ceramics, display ceramics, especially some colored glaze ceramics. Gray glaze will have different effects when used because of the different places of origin and plants used in plant ash. Because of this, it is difficult to copy an ancient gray glazed porcelain with the same glaze color and glaze surface as the sample.