Casseroles, Rammekins, Eggshell (Magnesia) glaze, gas fired. All pots produced are fired to Stoneware temperatures (1250 – 1310 degrees centigrade). This means they are able to be used for cooking, and are dishwasher and microwave safe. The clay and glaze are bonded because they both at least partially melt into one – hence the name ‘stoneware’ which denotes that the firing temperature has turned the clay into ‘stone’. Both glaze and pot are made stronger and more hard wearing by this high firing. I have customers who have used particular pots every day for longer than 35 years.