Introduction: the external and internal mechanism of drying. Method of defining moisture content. The effect of external conditions on drying: general considerations. Transfer of heat by convection. Transfer of heat by radiation. Transfer of heat by conduction. The internal mechanism of drying: general considerations. Adsorption of water at a solid surface. The drying mechanism of non-clay ceramics. The clay-water relationship. Volume changes of plastic bodies during drying. The leatherhard moisture content. Size changes of dust-pressed articles. Linear drying-shrinkage. Anisotropic shrinkage. Distribution and movement of moisture. Cracking and warping. Drying of slip-cast and jiggered ware.