2. Soaking. The older corn husks were placed in a tank and soaked in fresh water for approximately 3 hours. However, the tender husks were not soaked, as they required a different treatment.

3. Boiling. A large pot was filled with clean water and brought to a boil. Then, 12.5% of soda ash (based on the weight of the old and tender husks) was added to the boiling water. Once fully dissolved, both the soaked old husks and the unsoaked tender ones were added into the pot. The water level should completely cover the husks. The mixture was boiled for 3 hours, stirring every 30 minutes and maintaining the water level as needed.

4. Washing. When the husks became soft enough to be easily handled, the fire was turned off. They were then gently rinsed with clean water to remove the excess lye. The used lye was collected and reused during the next boiling process to save resources.

5. Crushing. The treated husks were placed in a container, broken up using a wooden stick, and mixed with fresh water. This helped separate the starch fibers from the husk material. The crushing and rolling process was repeated twice to maximize starch extraction.

6. Pressing. The slurry obtained after two rounds of pressing was poured into a cloth bag. It was then pressed firmly or squeezed using a heavy object to extract a white, starchy paste. The pressing continued until the liquid no longer had a pink tint, indicating that most of the starch had been removed.

7. Settling. The extracted paste was poured into a clean tank filled with water. As the mixture settled, the starch particles sank to the bottom, while the water remained on top.

8. Filtering. The settled starch at the bottom of the tank was transferred into a cloth bag. It was then shaken back and forth to drain out the excess water, resulting in wet starch ready for the next step.

9. Drying. The wet starch was spread out and left to dry in an open area outside the house. This natural drying method helped preserve the quality of the final product.

10. Packaging. Once fully dried, the starch was packaged according to customer requirements and stored in a warehouse for either storage or sale.

Although this method is relatively simple, it requires some skill and experience. It is recommended to start with small batches for trial production. On average, about 1.2 kg of wet starch can be produced per kilogram of corn husks, and approximately 0.5 kg of dry starch after drying. This traditional technique, passed down through generations, not only yields high-quality starch but also reflects the resourcefulness of rural communities in utilizing every part of the corn plant.

X Ray Side Protection Lead Goggles

X Ray Side Protection Lead Glasses,X Ray Side Protection Lead Eyewear,X Ray Side Protective Lead Glasses,Side Protection Model Lead Eyewear

Longkou Kangxie Medical Instrument Co., Ltd , https://www.kangxiemedical.com