Why do painter uses and paper in white washing the walls and in polishing doors?
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to smoothern the surface!!
Nikki57:
more explanation
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Sandpapers provide very highly force of friction.Painters rub the sandpaper on the wall and on the door for increasing the roughness of the surface of the wall and the door.When roughness increases,force of friction increases and thus adhesive force also increases.Paint sticks to the surface of the wall and door on account of adhesive force..
Hope it helps
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