. Commercial dehydration of fruits and vegetables. Fruit Drying; Vegetables Drying; Fruit Processing; Vegetables Processing. 30 BULLETIN 1335, U. S. DEPARTMENT OF AGRICULTURE dry, cool, and well ventilated (fig. 10). The doors should fit tight, and the windows should be covered with fine mesh screen to exclude dust and insects. An abundance of light assists in detecting the presence of insects and in keeping the room clean. The types of containers chosen for packing will depend largely upon the severity of the storage conditions, with particular refer- ence to the humidity and chances of insec
. Commercial dehydration of fruits and vegetables. Fruit Drying; Vegetables Drying; Fruit Processing; Vegetables Processing. 30 BULLETIN 1335, U. S. DEPARTMENT OF AGRICULTURE dry, cool, and well ventilated (fig. 10). The doors should fit tight, and the windows should be covered with fine mesh screen to exclude dust and insects. An abundance of light assists in detecting the presence of insects and in keeping the room clean. The types of containers chosen for packing will depend largely upon the severity of the storage conditions, with particular refer- ence to the humidity and chances of insect infestation. An ideal con- tainer would be one which, while moderate in cost, would keep the product from absorbing moisture when exposed to the most severe conditions of storage and shipment and would be impervious to insects. Only sealed tin cans and glass jars give absolute protection against moisture absorption and insect infestation. Friction-top cans are nearly as good. Tin containers, necessary for export ship- ments of dehydrated foods, are more expensive than paper containers. Wooden boxes are generally used for bulk goods. "Liners" of heavy. Fig. 10. -A packing room, with packing tables and conveyors, storage bins, and mixing and package, filling machinery paper or cardboard, and sometimes additional liners of waxed paper, are used. All types of paper containers with which experiments have been made allow the absorption of moisture when the products are stored in damp places. Also paper containers do not give perfect protec- tion against all insects, some of which can bore holes in paper con- tainers, while the larval forms of others are so small that they can crawl through the slightest imperfections at the joints where the cartons are sealed. Most products, however, keep satisfactorily in paper containers made of moisture-proof material and carefully sealed and preferably lined or wax wrapped, provided the initial moisture content is low and no live inse
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