For example, with the brown ones, sometimes almost black and other times more of a mid-brown colour? Or with ‘Supernova’ sometimes very dark and sometimes much lighter?
This is due to the different clay batches, which take on different colour intensities at different kiln firing temperatures. For reasons of space and time, it sometimes happens that raw materials from different clays are fired together at the same temperature, making some pieces lighter and others darker than average. However, this has no influence on the quality of the clay pieces, as the firing temperature is always above 1090 °C.
