The water can be left to settle for about eight hours, or overnight if you are not in a hurry to make cold skin. After the precipitation of the washing water, there will be layering, and then we just need to splash off the upper layer of the washing water to use the lower layer of starch water to make cold skin.

How long does it take for the water to precipitate? We usually need to turn the kneaded dough into the water and knead it when we are making the cold skin, this process is called washing the face, and the water left after washing the face can only be used to make the cold skin after precipitation, so how long does it take for the water to precipitate before it can be used?

Usually we only need to precipitate the water for about eight hours is enough, then we can see that the water appeared obvious layering, and then the upper layer of the water to splash off the starch water can be used in the lower layer of the water to make the cold skin.

If we are not in a hurry to make cold skin, we can also directly let the washing water precipitate some, so that the starch in the washing water can be more fully precipitated. It should be noted that when we precipitate the washing water, it is best to seal it so that it is not easily contaminated.