The coffee plant belongs to the Rubiaceae which includes 60 species of coffea. However only the first four are known: Arabica, considered the most prized one, Robusta, Liberica and Excelsa kind. The coffee plant demands particular climatic conditions: the most suitable is the one between the two tropics, where the climatic variations are not excessive and the temperature settles between 15° and 25°. The operations to extract the seeds, that will become coffee-bean, are several and complicated: first there is the transplant, then it is necessary to wait for the natural blossoming and fructification, to pass, finally, at the work phase. Coffee-beans endure particular procedures like: cleaning, selection, washing, exsiccation, in fact the characteristics and the best qualities depend on these actions. Finally the raw beans come collected in bags of juta, now destined to commerce.