Date of Award
Bachelor of Science
Pulp and Paper Technology
At the present time fairly harsh procedures are used to deink magazine waste paper. The paper must be cooked in the presence of strong chemicals such as sodium hydroxide at elevated temperature and in some cases this is even carried out under pressure. This results in the removal of ink but the fibers are considerably darkened due to this procedure (1,2). It was the object of this survey to explore the literature to see if there is any information on a relatively mild method involving enzymes, which due to the absence of harsh chemicals and high temperatures would possibly result in a deinked fiber with a minimum of discoloration and reduced shrinkage in yield.
Moore, Edgar E. Jr., "Deinking of Coated Magazine Papers: Experiments with Some Enzymes" (1961). Paper Engineering Senior Theses. 366.