This study was done in order to investigate the optical properties of chemimechanical pulp and paper produced from canola. Cooking process was implemented chemimechanical using up to 20 percent chemicals for 30, 40 and 50 minutes at 170 °C. Pulps were then processed in laboratory refiner to reach freeness values of 300±25 mL CSF. Optical properties from hand sheet papers were finally measured based on TAPPI standards. results showed that optical properties such as opacity and brightness has been increased while some others like yellowness have been decreased as treatment process is intensified (at lower yields). Additional examination on the optical properties of chemimechanical pulp and paper reveals that the treated paper for 50 min using 20 percent chemicals has proved superior properties with opacity and brightness being significantly higher than that of others.
کلید واژگان :Canola, Chemimechanical Pulping (CMP), Freeness, Opacity, Brightness, Yellowness
ارزش ریالی : 300000 ریال
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