Gorgan University Of Agricultural Sciences and Natural Resources Journal of Wood and Forest Science and Technology 2322-2077 19 4 2013 02 19 Assessment of Flotation Time Effects on Appearance Properties of Chemical and Enzymatic Deinked Pulp by Reverse Power Fit Equations Assessment of Flotation Time Effects on Appearance Properties of Chemical and Enzymatic Deinked Pulp by Reverse Power Fit Equations 137 150 1220 FA Journal Article 2013 07 21 In this paper deinkability of office waste deinked pulp by commercial cellulase from <em>Aspergillus niger</em> fungus and chemical method using flotation process was compared. Progress in appearance properties of deinked papers was studied by reverse power fit equations. The results showed that the top side and wire side of the deinked pulp handsheets had significant difference in dirt count and area of ink particles. Maximum decrease in ink count and ink area, occurred in the first 10 min of flotation, the rate of deinking was reduced by increasing flotation time. Handsheet brightness was initially increased by increasing flotation time and then reduced by further flotation. In this paper deinkability of office waste deinked pulp by commercial cellulase from <em>Aspergillus niger</em> fungus and chemical method using flotation process was compared. Progress in appearance properties of deinked papers was studied by reverse power fit equations. The results showed that the top side and wire side of the deinked pulp handsheets had significant difference in dirt count and area of ink particles. Maximum decrease in ink count and ink area, occurred in the first 10 min of flotation, the rate of deinking was reduced by increasing flotation time. Handsheet brightness was initially increased by increasing flotation time and then reduced by further flotation. https://jwfst.gau.ac.ir/article_1220_f468e4d68c8b23b3472bca3fda8c4463.pdf