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The kind and the mixing ratio of recovered papers would af fect the quality of final recycled paper. In this study, effects of the mixing ratio of various domestic recycled papers (old ne ws print (ONP), old corru-gated container (OCC) and coated paper (CP)) on vari ations in physical properties of paper and its pro-ductivity were investigated. When the mixing ratio of CP grade increased, the freeness (CSF) of recycled pulp was increased while paper strength and white water turbidity was decreased. Paper strength was de-creased as the percentage of OCC was higher than ONP. When ONP was mixed with OCC, no adverse effect was observed except the increased drainage resistance. It is expected that these results could be utilized as fundamental data to establish regulations for the recovered paper grades according to mixing ratios of different kinds of them. Keywords : Old News Print(ONP), Old Corrugated Container(OCC), Coated Paper(CP), Mixing ratio, Paper Quality, Forming Process

Analysis of Paper Qualities and Forming Process at Varied Mixing Ratios of Different Kinds of Recovered Paper