In sun drying, small fruits are prepared and spread on trays to dry in the sun for several days, then stacked to complete the drying cycle in shaded areas. Larger fruits, such as apricots, peaches and pears, are halved and pitted, and apples are peeled, cored and sliced prior to drying. Such fruits are sulfured to prevent enzymatic browning. Sun drying times vary between 4 and 25 days. Depending upon the size of the product, the type of pretreatment, etc. During sun drying , precautions must be taken to prevent contamination from wind-blown dust and dirt. Moisture contents in sun dried products vary between 10 and 35% depending upon the tendency of the dried product to absorb moisture. After drying, some fruit may require moisture-vapor proof containers.