It is the phase in which the dough is formed that will then turn into paper.
The first procedure is to insert the recycled paper and cardboard with the presence of plastic and ferrous waste in the pulper. This operation recovers the cellulose fibers that are well separated and hydrated.
The product of this section is called suspension and consists of fibers suspended in a 4% aqueous solution. After the pulping stage, the refining stage follows, where fiber bonds increase. Mixing, dilution, and purging are the following three phases.