This kiln is in the process of being loaded with greenware (unfired clay items) which when the kiln is filled will be fired up to 1750-1800 degrees Fahrenheit and will be called bisque ware after firing. This firing makes the clay items available to receive a glaze, which will then be fired once again up to 2385 degrees Fahrenheit and become vitrified or impervious to water and harder than metal.