Raisins

has a long history in China and is a well-known speciality that sells well at home and abroad. Its advantages are significantly reduced in weight, significantly reduced in size, easy to transport, can be long-term preservation, easy to eat, rich in nutrition, very popular exploration, navigation and tourists.
Process
Raw material selection→wash fruit → dry→ packaging
operating points
a. Raw material selection dried grape fresh fruit, should choose high solid content, good flavor color, enzyme browning is not serious, suitable ripeness, fruit skin thin, meat soft, sugar content of more than 20% non-nuclear varieties.
b. Washing and de-fouling is generally washed with 1.5-4.0% sodium hydroxide solution, wash the wax attached to the peel, harmful
microorganisms
, at the same time can be disinfected, and the peel appears small cracks, in order to facilitate evaporation of moisture, promote
drying
.
c. drying and drying natural drying and manual drying.
Natural drying will deal with washed raw materials, loaded into the sunbathing plate for 3-5 days, and then flip, continue to sunbathe for 2-3 days, and then the tanning plate in the ventilation room stacked with dry, about 30 days, the mouth color bright green, good quality. Then store back soft for more than 3 weeks, granulated to terrier, packaging. The advantage of natural drying is that the equipment is simple, the cost is reduced, but limited by the climate, the drying time is too long, easy to reduce product quality.
manual dry system must have a good
heating
insulation, ventilation and loose water equipment, but also have good sanitary conditions, which can greatly shorten the drying time, to ensure the quality of production. However, the cost is higher and the operation technology is more complex. At present, many raisin units at home and abroad, gradually to the direction of artificial drying development.