Manufacturing process.

As it turns out, these two metals reach the market in the most diverse forms and configurations. It is important to bear in mind that zinc and copper placed on the market are not in their pure state, that is, they are alloys.
The composition of the alloy includes other metals that complement it and provide other types of characteristics , depending on the intended use. In the case of laminated zinc and copper, the addition of aluminum, titanium, lead or phosphorus, as examples, allows them to be transformed into a wide variety of pieces with different dimensions and configurations.
After the entire process of extraction, transport, factory collection and preparation for casting, there is a rolling process. This last process transforms the mixture of various metals, with well-defined percentages, into a paste that will become a sheet with a reduced thickness.

Over the years, the rolling process has evolved in such a way that it allows, nowadays, to produce thousands of tons in a short period of time. It can be said that it is an important industry in the world economy, moving several sectors, such as mining, transport, rolling, placing on the market, employing thousands of people all over the world.
The emergence in recent years, as a result of growing environmental concerns, of a market for the recycling and reuse of these two metals is noteworthy.
According to Borges, the lamination process is similar for both zinc and copper. This process consists of transforming a bar, ingot, plate or wire into a workable sheet of reduced thickness.
The metal, together with other metals that will be mentioned later on, after being melted in appropriate furnaces and at the appropriate temperature, is transformed into a paste. This paste is molded and cooled into a roll of material approximately 1.10 m wide and 14 mm thick. This band is taken to pass through a set of cylinders, which rotate among themselves, which reduce its thickness by pressure, until reaching the desired dimension, normally between 0.5 mm and 1.0 mm.
The next step is cutting for winding on reels weighing around 1000.00 kg, in widths and thicknesses in the standard commercial measures that are sold, or cutting in sheets of 2.00 mx 1.00 m.

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