1. The water in which dried kelp has been soaked usually appears green, which is normal. Black or red may be due to added pigments. It is recommended not to eat it.

2. Method for soaking dried kelp

1. Cut the dried kelp into sections of about 15 cm, open them, put them in a basin and fill them with cold water (tap water is fine, but never Soak in hot water) and soak overnight

2. Take out the soaked kelp piece by piece and rub it like washing clothes to loosen the dirt on it, and then rinse it under running water

3. Place the washed kelp on the curtain of the steamer, cover the pot, and steam over high heat for 30 minutes. Turn off the heat, simmer for another 10 minutes, and then open the lid.

4. After it cools, wash it with running water. Remove the mucilage on it, and then you can cook it cold or stir-fry or stew it. If you still feel it is not too soft when it is cold, you can cut it into shreds and put it in a pot and boil it for 5 minutes. Remember to add it to the pot. Pour a little vinegar into the pot. After taking it out and submerging it in cold water, it will become soft and crispy. The fresh kelp you buy will taste soft and crispy after being cooked like this and then cold.