There are three processing methods of raisins: one is to directly expose selenium to the sun to make brown raisins; The second is to dry in a cool room. Xinjiang can only be made in Hotan area of Turpan Basin. The climate here is dry, the temperature is high in autumn, and dry and hot winds often blow. The shady house is not on the roof or on the slope; 3 meters high; 4 meters wide and 6-8 meters long, made of adobe. The walls are covered with ventilation holes smaller than L, and there are rows of wooden frames in the room. It takes 30-45 days for ripe grapes to hang on it in a string under the blowing of dry and hot wind. The finished product is green in color, pearl-like, soft and sweet in meat and rich in nutrition. The famous Xinjiang "seedless white and green raisins" were made in this way. Its sugar content is as high as 69.7 1%, and its acid content is 1.4-2. 1%. The third is the rapid drying method adopted in recent years. The grapes are first treated with dehydrating agent, and then dried in a cool room or dried by a dryer, which greatly shortens the drying time.

It takes about 40 days to make raisins. (Raisin purchase strategy: Raisins are made of seedless white and mare's milk, as well as medicinal grapes. I feel that seedless white is the best, and it is a bit troublesome to eat raisins with seeds in mare's milk. From the production method, raisins are naturally dried in the drying room and dried on the roof, such as: masculine fragrance, feminine fragrance; The choice of raisins mainly depends on the color. The dried raisins are too green, which may be due to the use of dehydrating agents. The color is too yellow, maybe it is old; The color is preferably light yellow and the hardness is moderate. The dried raisins are brown and have a special taste.

The first thing is to choose raw materials: thin skin, full meat, maturity, high sugar content and so on.

Secondly, alkali is used to accelerate the evaporation of water.

Then put the grapes in a drying tray to dry in the shade (Xinjiang can just dry them in a ventilated room)

Finally, pile up the grapes and dry them evenly.