What laundry items must never be dried in the washer dryer?

Items labelled with the 'Do not dry' care symbol, delicates such as silk and synthetic curtains, and textiles containing foam rubber or similar materials must never be dried in the appliance. Textiles treated with flammable liquids such as stain remover, petroleum ether, or thinners must also not be dried due to the risk of explosion. Laundry that still contains hairspray or similar substances is also prohibited from drying. (Page 27)