The raw materials for processing dehydrated tomatoes should be those that have matured, thick and dense pulp, and less juice. It is best to choose a variety of juice and seedless ventricles. Raw material processing: sliced ​​or cut. For slicing, cut the tomato about 1 cm thick. Divided into discriminating, the tomato is divided into 6 or 8 petals along the fruit stem, but not completely cut, and the petals are still connected to the petals. After cutting, spread the plate, that is, spread it evenly on the baking tray, and the thickness to be spread is even. It is best to use a wood tray with excellent quality without any smell. Do not use a baking tray made of barbed wire, as the acidity of tomato juice is high, it is easy to corrode the metal and affect the quality.

After paving the plate, install the drying cart on the patrol plate. Each time it is filled, the drying cart is pushed into the[url]https://www.vegemachine.com/dry/tomato-dehydration-machine-food.html tomato drying machine[/url][/url] for dehydration and drying. Tomatoes are generally dried using a tunnel dehydrator at a temperature of 60-70 ° C. At the beginning, use a temperature of 45 ° C, and then gradually increase it, so as not to form a dry film on the tomato surface due to rapid evaporation of water, which makes it difficult for the water inside the tissue to evaporate. The drying temperature should not be too high, so as not to darken the tomato color. The flat dry ratio of tomatoes is about 16: 1, which means that 16 pounds of fresh raw materials can make a pound of finished product. Check if the tomato is dry enough. Take out the dried slices and squeeze with your fingers. If there is no water leakage, dry quickly. If it can be broken, it means that it has dried and should be released immediately. The dried tomatoes can be placed in a box to balance the moisture and then packaged.

The quality of the packaging directly affects the quality of the product. Packaging utensils are usually tinplate boxes. Before the iron box is sealed, carbon dioxide or nitrogen can be passed in to exclude the air in the hearing box for storage, or vacuum extraction after sealing can also achieve the same effect.

In order to improve the quality of dehydrated tomatoes and get a good color, the tomatoes are generally sulphurized for 20-30 minutes before dehydration. Each cubic meter of smoked room can hold 12 kg of fruit and the sulfur consumption is 20-25 grams. In addition, using sodium bisulfite solution (concentration 0.8 good effect 1%) for several minutes (3-4 minutes), you can also get good results.