Hot air oven when the dough into the hot air is blown through the dough. Heat is transferred to the surface of the dough and evaporated by the heat of the steam. Water vapor diffusion through air film and was blown away by the wind moving. These conditions will cause the vapor pressure at the surface of a lower pressure inside the restaurant. As a result, the difference in water vapor pressure. Food inner layer has a high vapor pressure and gradually. Dropping food on the floor near to air dry. These differences cause pressure to hydration out of food. Over time, it is less moisture in the dough and spread to the surface of the dough is not continuous. Cause the liquid to cover uneven. Drying rate fell And over time has been increased. Humidity will decline Until the equilibrium moisture The water in the diet can cause the water evaporates, the remaining decline.
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