among the natural fibers particularly useful are fibers of sisal sugar cane molasses of cocoa of pia u00e7ava of soy of jute of ramie and of curau u00e1 among the lignocellulosic residues particularly useful are wood dust or rice hull the composite material according to this embodiment may additionally comprise approximately 0 01 to approximately 15 in weight of an elastomeric impact modifier approximately 0 01 to approximately 0 5 in weight of an auxiliary processing agent dispersant and approximately 0 01 to approximately 2 in weight of one or more pigments the present invention also refers to a process for the preparation of a composite material the process starts after the choice of the formulation of the composite material in accordance with the ranges defined above after the definition of the formulations of the composite it is necessary to proceed with i the uniformization of the fiber length as it is well known for those skilled in the art the natural fibers have different lengths and sometimes the length is above the desired whereby an uniformization of its length is advantageous to better make use of them in the process of the present invention the uniformization operation of the fiber length may be carried out by any adequate means for example in a hammer mill with an appropriate set of knifes and controlled speed operation to avoid the formation of fines undesired in the production of composite granulate a particularly adequate fiber length for the process of the present invention is between about 1 mm and about 8 mm more particularly between about 2 mm and about 6.