passive vOice again??

     Modern paper is manufactured from a mixture of various fibers, including wood, grass and cotton by people. The bark is removed by the workers, when the logs arrive at the factory. Then the wood is fed by them into a mill  in order to grind it to a pulp. A great deal of water and various vegetable fibers is added by the workers at this stage. The pulp is bleached and then is beaten to break down still further. The glue and resin are mixed by them with the pulp so that they obtain a better consistency. Next, on the wire screens are poured and rolled it by them with the purpose of removing the water. Then it is pressed and watermarked by the workers. Then, it is subsequently dried and glazed by them as to obtain a smooth finish. Finally, it is reeled on to long rollers and it is cutted to size by them.