1, spread out the kelp, shake off the sand and salt, put it in a basin and soak it in water.

2, add warm water to soak.

3, add a little vinegar after adding warm water.

4, add a spoonful of lye and press gently to soak completely, soak for four hours.

5, four hours later gently scratched to remove impurities.

6, and finally put in the water to wash, rub a few times, repeat a few times can be.