The used paper sent center of recycling and they seperate group like newspaper, cardboard etc. They mix with water. This step make specific heat. Because of this step  provide to clean foreign material.

To convert pulp slurry into a sheet, we pass the pulp through a sheet former that drains the water through a combination of gravity and vacuum. The sheet then passes through the press sections — which squeeze out more water — before heading for the dryer, where it runs the gauntlet of steam-heated air jets that reduce water content to less than 10 per cent..

Later this sheet is cutting and it’s ready  despatch for;

-Producer of file
-Binding
-Bookbinder
-Textile.