Reasons for scratching the wall of a flask when precipitate crystals [closed]








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I heard that scratching the wall of the flask helps precipitate crystals when obtaining crystals.
By scratching the wall of the flask, the crystals from it fall in the center and act as seeds to help produce crystals?
So, can it be said that the process of scratching the walls of the flask induces heterogeneous nucleation and helps crystallization?
To understand this, would it be helpful to study 'crystallization (creation of crystalline nuclei and growth of crystals)?
Will this process of scratching the wall of the flask ultimately help increase the yield?


