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2. Drying process: drying at 65 degrees Celsius, the drying standard is to look at the single schedule of the core, and when the core is broken, the monotony can be stagnant. If the natural monotonous method is used for drying in the sun, it takes a long time to reach the standard for about ten days. Because of the long monotonous time, the degree of browning of the shell will be deepened. If the degree of browning is reduced, it can be smoked before being monotonous. Sulfur solution, so that the dried longan dry color will be light yellow.
3. The dry process of longan meat is called yuan meat processing. It requires artificial shelling, to the core, leaving only the pulp. If it is not pre-resolved, the pulp will be browned until it turns black during the drying process. Prior to drying, the flesh is spread out in a bamboo sieve and smoked in a sealed smoked room. The sulphur used is pure and cannot contain other impurities. About 10-15 grams of solid sulfur are burned per 1 cubic meter of volume. In the meantime, the concentration of sulfur dioxide is 1-2%, which can achieve the goal of inhibiting browning and maintaining good color. The time for burning sulphur is about 15 minutes. After the sulphur dioxide gas is fully evaporated, the ability to enter the next process.
4. Dried: longan meat contains high sugar content, one is prone to non-enzymatic browning, and the second is that if sun drying can cause the phenomenon of degrading insects, it should use artificial monotony, that is, drying room or artificial monotonous machine at 60-65 degrees Celsius. Under the monotony, the time is about 36 hours, the product moisture content is 16%.
5. Finished product packaging: After the longan meat is dried, it is called the meat and should be sealed in moisture-proof packaging and stored under low temperature and low humidity.
Yuan meat processing skills
1. Raw materials to solve: There are two ways to dry longan, one is the whole dried fruit, one is dried longan meat. Dried fruits: The longan is relatively firm due to its shell. To speed up the drying process, it is usually pre-resolved before drying. This is done by hot watering at 100 degrees Celsius for 2-3 minutes.