Third, the filter pot: the pulverized milk into the cylinder or barrel, with hot water slush, add water per 100 kg of soybeans plus 500 kg of hot water, stir, and then prepare another cylinder or In the bucket, pour the soy milk into the filter bag and shake the bag continuously to filter the slurry. In this way, three times of filtration can leach bean dregs. Then the filtered soy milk is poured into a special flat iron pan for cooking.
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First, the selection of raw materials: The main raw material for making yuba is soybeans. In order to highlight the bright white of the dried bean curd, the yellowish-skinned soybean should be selected instead of the green-skinned soybean. At the same time, we must also pay attention to the selection of fresh, golden yellow, mildew-free, and non-worm-eaten fresh soybeans. We must remove the bad beans, impurities, and sand through the screening to make the raw materials pure, and then place them in an electric universal grinder to remove the beanie.
Second, dip bean refining: Put the soy beans into the cylinder or bucket, add water soak, remove the impurities floating on the water. The amount of water was just submerged in beans. Dip bean time, soak for 20 minutes in summer, and then drain and put it in a basket to drain it and cover it with cloth to allow the bean pieces to expand. If the temperature is below 0°C in winter, add some hot water when soaking, soaking time 30- For 40 minutes, soak the drain and place the beans in the bowl or bucket. Cover with the same cloth to allow the beans to enlarge. The above process takes about 8 hours to refine the pulp. The water should be even when the refining, so that the milk out of the delicate white and tender.
Fourth, picking pulp picking film: This is a key link in the production of dried bean curd. The operation steps are as follows: When the pot is on fire, the stove can stop the blast after the milk in the pot is boiled, and use charcoal, coal or wood chips to cover the fire to suppress the flame, lower the temperature of the stove, and remove the white of the pot. foam. After 5-6 minutes, the pulp surface naturally forms a thin film, which is yuba film. At this point, use a pair of scissors to cut the yuba film into two halves, then use the bamboo sash to stir it up along the side of the pot so that the yuba form a bamboo strip. Usually 15 kilograms of soybean milk per pot can expose 60 pieces of bean curd. After the wok is cooked, the bean curd is usually dried on bamboo rafts. In the process of uncovering the film, the key to success or failure is threefold: First, after reducing the temperature of the furnace, if the charcoal fire or coal fire fails to reach or is too slow, the temperature difference in the pan is too large, and it will become a rot, not a film. Therefore, after stopping the blast, you must add the charcoal fire prepared in advance to keep it warm. Boiler steam can be used as input to the bottom of the boiler, and the pulp is not boiled directly. The second is that the pot temperature has not dropped and continues to boil, which will cause the bottom of the pot to burn and the output will drop. Third, the white foam in the pot does not remove the net, which will directly affect the formation of the film.
Fifth, drying into a bamboo: yuba film should not be dried in the sun, easy to mold in the sun. The yam film on the wok was hung on a drying rack and kept at a temperature of 60°C. If the fire temperature is too high, it will affect the color of the yuba. Generally dry for 6-8 hours. After drying, the heads and tails are aligned, and plastic film bags are used to pack small bags. The texture of yuba is relatively brittle and it is a fragile food. During storage and transportation, care must be taken to prevent it from being heavily compressed or beaten. At the same time, moisture should be taken care of so as not to affect product quality and reduce economic value. 
Yuba processing new technology
Yuba is a high-protein soybean product. Yuba processing, easy access to raw materials, and simple technology are good projects for a family to get rich. The production process is now described as follows: