It is a well-known fact that the selection of the raw material and how it is further treated within the stock preparation system has a major affect on the quality of paper obtained. While the pulp selection is important for a good product, the refining treatment received by that pulp is the determining factor for the properties of the product. It is for these reasons that it is interesting and beneficial to study the pulp quality and refining results. The focus of this research work was to study the behaviour of selected clones of Eucalyptus materials from different site indices under different refining conditions. Poor and good sites were investigated. The strength properties of the resulting refined pulp were investigated. The project was conducted in three phases with the focus of the project being phase 3. The work began with refining of commercial Eucalyptus pulp obtained from Mondi Richards Bay (phase 1). The objective here was to get an understanding of the influence of the various parameters affecting refining. This knowledge could then be used on a more focused research program on the well defined pulps with limited refining variables being considered. The results indicated that of the three variables investigated (i.e. stock flow rate, stock consistenc
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