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The production of handmade paper is a sustainable process that has a relevant social and economic function, especially in developing countries. In the search for alternative, renewable and low-cost sources for cellulose and handmade paper production, we evaluated the morphological characteristics and chemical composition of fibers of leaves and culms from  Arundo donax , a fast-growing invasive grass that was introduced in several countries, including Brazil. The fibers of  A. donax  are long (leaf = 1.73 mm; culm = 1.26 mm), with thick cell walls (leaf = 4.97 µm; culm = 5.36 µm), which provide folding endurance and result in a rougher and more voluminous paper. Additionally, the high values of cell wall fraction (leaf = 78%; culm = 82%) indicate great fiber stiffness. The relatively high values of cellulose (leaf = 38.9%; culm = 39.4%) and low values of lignin (leaf = 12.1%; culm = 13.0%) in the fibers make its use in paper production advantageous, as it reduces costs with chemical products in pulping. Fibers from  A. donax  are a viable alternative material to produce cellulose and handmade paper or can be mixed with other raw materials to produce different types of paper.

Characterization of Fibers from Culms and Leaves of Arundo donax L. (Poaceae) for Handmade Paper Production