2, clean the selected sweet potato into the basket, into the water. Wash away the soil, impurities. Trim the ends and surface roots.
3, crushing selected sweet potatoes should be promptly chopped with a grinder and then ground into pulp. When pulping, water should be added while grinding, and the finer the grinding, the better, so that the starch granules in the cells can be ground out as much as possible to improve the powder rate.
4, the purpose of filtration is to realize the separation of skin and starch. Generally use 2-5 feet hanging pulp cloth as a filter bag for filtration, **** filter twice. The first slurry on some thin, the second on some thick. Then the filtrate will be sent to the sedimentation tank. Into the pool after two days of resting, put out the pool of the upper layer of clear liquid. Add the original amount of water 1/3 of the water for mixing, and then filtered once. This time the filtrate into a small pool, static precipitation.
5, (exposure starch. When the water in the pool has no turbidity, that is, all clarified, drain the upper layer of clear liquid. Shed starch precipitation layer surface oil powder, the lower layer of starch out of the hanging into the powder, moved to the sun exposure. When half of the water evaporated in the powder, and then cut the powder into a number of parts, for exposure to the sun. The sun field is located in a windy and sunny place, in order to prevent dust pollution.
6, batter. This process is the key to determining the quality of vermicelli. According to every 500 grams of starch plus 25 grams of alum, 2.5-3 kg of cold water, stirring, and then put the big pot to boil, and constantly stirring, the maturity of 8-9 into that (the formation of paste starch). The batter, can be made to other starches, stirred into a moderate soft dough.
7, leakage of silk and cooling. Leakage silk before preparing two pots (model 8), two cold water tanks and medium-sized 48-hole leakage spoon. Because of the sweet potato fans thicker, the leakage spoon hole than other fans leakage spoon slightly larger. When funneling silk, the paste should be well stirred, adding warm water while stirring, and the temperature of the water should be about 50°C. The paste should be stirred well, adding warm water while stirring. Grab a ball of batter and let it hang down naturally. If it doesn't break, it means that it's thin and thick, and you can start to leak the threads. Prepare a pot of boiling water, constantly replenished into the leaky pot when the water in the leaky pot near boiling (97-98 ° C), the leakage of silk, so that the powder through the leaky spoon eyelets downstream, and gradually extend the thinning of the vermicelli. Vermicelli sinking to the bottom of the pot after the paste, and then floated out of the water, then fish out, into the cold water tank to cool down, hand finishing into a bunch, wear to the wooden frame, and then another cold water tank to cool down again, and keep swinging until the fans loose into the strip until, and then placed indoors, after the cold out of the sunshine outdoor silk.
8, sunshine. The fans will be taken to the windy and sunny site, hanging sun. After drying, you can organize and pack them into finished products.