The species object of this study, The Eucalyptus Globulus Labilly Eucaliptus Grandis were chosen for this purpose considering: its greater abundance in relation to other species of Eucalyptus and hardwoods existing in the country, its rapid growth and its higher volumetric yield per hectare. All the Eucalyptus species tested come from the Cuzco area, which at the trial of the Foresters offer the best climatic conditions for the growth of these species. Pinus radiata splinters were shipped from Canada in hermetically sealed bags. To obtain the pulps, the sulphate process was used, also called Kraft, and the cellulose pulps were then bleached through a scheme or CEDA sequence. (Chlorination, Extraction, Dioxidation). For the technical evaluation and subsequent comparison of these Eucalyptus, the main parameters of the digestion were kept constant, such as% sulphidity, active Alkali, cookin...