الفهرس 
Introduction and Review of Literature.Only 14 pages are availabe for public view
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Abstract
The object of the present investigations is the study of bleaching rice straw and bagasse pulps using the conventional and non-conventional methods applying the multistage bleaching processes. In the non-conventional method water-organic solvent bleaching mixtures was used to reveal the effect of using solvents to minimize the pollution caused by industrial wastes discharged into the drain. The organic solvents used are methanol ethanol acetone and dioxane.The analysis of bleached pulps produced and the properties of paper-sheets prepared from these bleached pulps are explained.The thesis falls into three chapters .