How do fresh dates become red dates, and how do fresh dates become dried dates?

Jujube is made from fully ripe fresh jujube, which is the dried product with the largest processing capacity, the simplest method and the most widely used jujube in China.

The drying methods mainly include drying method, sun drying method, baking method and dryer drying method. In addition, in recent years, new methods such as freeze sublimation drying method, microwave drying method, far infrared drying method, and solar drying method have been newly developed. Either way, the fresh dates used should be harvested and graded when they are fully ripe.

To improve quality, blanch in boiling water for 5 to 10 minutes before drying.

Drying method: Hang the fresh jujube stall in a dry and ventilated place, and turn it once every 1 3 days, so that the jujube gradually loses moisture and becomes a dried jujube. This method is suitable for areas with many rainy days during the harvest period and varieties with thin flesh and coarse texture.

The jujube obtained by this method is bright in color, relatively full in appearance, less wrinkles and lighter, and more beautiful.

Sun-drying method: choose a dry, flat and ventilated place to set up a drying field, and spread it on the brick with sorghum stalks, about 20cm from the ground, as a jujube shop. The jujube is spread into a high and low tile ridge shape, evenly spread on the jujube shop for exposure, the thickness is 6 10cm, 30 50kg per square meter of pavement is paved, and it is turned once every 1 hour or so to dry evenly up and down.

At night, they are piled up in the middle of the bunks and covered with mats to protect them from dew and rain. If the weather is clear, it can be dried in 10 days.

Baking method: Generally, a special baking room with coal and other raw materials should be built. The various forms of baking rooms are composed of several parts, such as a heating system, a ventilation and dehumidification system, and a loading system.

The baking method is to grade the fresh jujubes according to their size and maturity, pick out the rotten jujubes, and put them on the shelves respectively, with a thickness of 2 layers. Once plated and on the shelves, close the door and exhaust pipe and start baking. The whole baking process is divided into three stages: heating, evaporating water and drying.

During the heating phase, the temperature of the oven should rise slowly and steadily to 55; In the evaporation stage, the temperature is raised from 55 to 65 68, but should not exceed 70, and it is maintained for 8 10 hours; In the drying stage, the temperature in the oven is lowered to 55 for 4 to 6 hours. The whole stage is damp 1 2 times. In the later stage, pay attention to the selection of jujube plates that meet the drying requirements and leave the room at any time.

It should be dried, and most of the dried fruits are dried now.

You can use the drying method, the drying method, and the boiling and drying method to peel the dates and dry them into dried red dates. The drying method is to choose a dry, smooth, and ventilated area as the drying field, and the dates are built into a high and low tile ridge shape and exposed to the sun. Jujube is also called jujube, prickly jujube, guanjujube, jujube, fresh food, can be made into candied jujube, red jujube, can also be used as jujube paste, jujube wine.

Dates are native to China, but are also cultivated in Asia, Europe, and the Americas, and grow in mountains, hills, or plains below 1,700 meters above sea level.

The varieties of jujube can be divided into: July fresh, egg jujube, pear jujube, Jin jujube, Zanhuang jujube and Qin jujube No. 1.

The nutrients of jujube include protein, fat, dietary fiber, sodium, magnesium, phosphorus, potassium, calcium, copper, zinc, selenium, vitamin B, and vitamin C.

1. Choose a flat, water-free, sunny place, and use bricks, bamboo poles and other materials to branch the foil from the ground 15-20 cm high. Spread the dates on top 5-10 cm thick and expose them to the sun for 3-5 days. In this process, it is turned every hour, 8-10 times a day, and at sunset it is piled up in a ridge shape and covered with a mat.

The next day, remove the mat, wait for the foil surface to dry and then spread out the dates, and vacate the foil surface of the middle pile of dates. After 3-5 days of exposure, the dates are spread out and dried every morning, piled up at 11 o'clock in the morning, spread out again after 2 o'clock in the afternoon, and collected and covered in the evening. After 10 days of drying, the moisture content of the fruit drops to below 28, the peel texture is shallow, and the hand is elastic, so you can pile up the dates and foil and cover them with a mat.

Open the mat and ventilate for 3-4 hours a day.

Second, there are four points to pay attention to:

1. The fire of boiling water should be strong, and the fire should be strong, so that the water for boiling the dates will be boiled quickly, or the dates will not be fresh if they are not soaked for a long time;

2. The mat for drying dates should not be spread on the ground, but should be supported underneath and the mat should be elevated to ensure its air permeability;

3. The dried dates should be turned over from time to time to dry evenly;

4. It is necessary to boil the water to scald, this process kills some germs and makes the dates not easy to rot.

Cosmetic effect. Red dates will make the complexion ruddy, because it has the effect of nourishing the skin and blood. If you often use red dates to cook porridge or soup, it can promote human hematopoiesis, effectively prevent anemia, and make the skin more and more rosy.

Whitening and freckle removal. Jujube is rich in vitamin C [6] and cyclic adenosine monophosphate, which can promote the metabolism of skin cells, prevent melanin, make the skin more and more white and smooth, and achieve the beauty and skin care effects of whitening skin and removing freckles.

Slows down aging. Jujube can nourish blood and calm the nerves, nourish the spleen and stomach, if the elderly and frail people often eat, can enhance physical fitness, delay aging; If it is eaten by office workers, it can enhance appetite and relieve tension; If you make a cup of jujube tea at night, it can be effective** insomnia.

Nourishes qi and blood. According to the Chinese herbal medicine book Benjing, red dates have a sweet and warm taste, spleen and stomach meridians, and have the functions of nourishing and benefiting qi, nourishing blood and calming the nerves, and easing medicinal properties. Modern pharmacological research has found that jujube can enhance the oxygen content in the blood, nourish the cells of the whole body, and is a strong agent that eases the efficacy.