Buy: Northeast high-quality soybeans, free of insect beans, mold beans, black beans and impurities.

2.

Cleaning: Wash the soybeans with clear water before soaking.

3.

Soak beans: 1 kg of soybeans, soaked in 4 kg of water. The soaking time is 8- 10 hour in spring, 6-8 hours in summer and 12 hour in winter.

small

Time. If the beans are soaked in warm water, the temperature should not exceed 35 degrees. ) Beans should not touch water after swelling. Beans split in two are flaky, and a concave heart means that they are not soaked thoroughly. Foam means over-soaking)

4.

Grinding beans: the first grinding is moderate, the water flow is ￠8- 10 mm, and the water ratio of adding 140 kg wet soybeans (about 6 kg dry soybeans) to tofu is 1:6, that is, 36 kg raw soybean milk (the water ratio of soybean milk is 1:8. Note: (After the first grinding, add water to the bean dregs to make a paste, then grind it again and add it to the pulp. )

5.

Boiling: Boil the pulp to about 80℃, add defoaming agent (8 g /40 kg) and stir evenly with a long spoon until the foam disappears and goes out when it reaches 98℃. (Soymilk will be heated to 103 degrees with waste heat. Power consumption can be reduced)

6.

Slurry discharge: the slurry is filtered by a filter frame and a filter screen, and the salt water can be ignited after the temperature is naturally reduced to 80-85 degrees.

7.

Briquetting: Dilute the bittern slices with water (the ratio is 1: 1.5) to make bittern, add a proper amount of salt (it is advisable to precipitate a little salt), slowly stir the pulp up and down with a spoon when the temperature is 80-85 degrees, and slowly add bittern to make the bittern flow less when it is flocculent, and stop bittern when it is 80% (bittern amount).

8.

Squatting cylinder: let it stand for about 10 minute to allow protein to fully solidify.

9.

Molding: In the tofu molding box, first spread bean wrap cloth diagonally, and put tofu into the box from four corners. No stirring is allowed before putting tofu, and the tofu is covered flat. Then, spinning forming is carried out. Squeeze the spring slowly when rotating, and the spring can stop when there is a little gap. Repeat this for three times, 10 minutes to form.