Glazed Ceramic Dishes
This type of dish may heat considerably.
Painted glazed ceramic dishes may be used if the painting is done under the glaze.
Many glazes and colours contain metallic substances. If this is the case they should not be used in the microwave as they may be damaged.
Recipients with silver and gold glazes may go dark.
Plastic
Plastic dishes should be heat resistant (at least 180° C) or they may be deformed when used in the microwave. Melamine dishes are not suitable for use in the microwave as they heat up too much.
To cook or heat food in plastic bags, they should be perforated to allow vapour to escape thus preventing the bag from bursting.
Wood
Wooden recipients should not be used in the microwave. Wood contains water which evaporates and may cause the recipient to crack.
