Relationship between putty powder and cellulose

Why does putty powder become thinner as it is stirred after adding water?

Cellulose, as a thickener and water-retaining agent, is applied to putty. Due to the thixotropy of cellulose itself, the addition of cellulose in putty powder also leads to the thixotropy of putty after adding water. This thixotropy is caused by the destruction of loosely combined structure of components in putty powder. This kind of structure comes into being at rest, and breaks up under the action of stress. That is to say, the viscosity decreases when stirred, and it recovers when at rest.

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