Date of Award


Degree Name

Bachelor of Science


Paper Science and Engineering


In studying the effects of deinking newspaper using recycled water, I found that the degree of dissolved solids was extremely important. It was discovered that using fresh distilled water to deink with resulted in a 5% drop in brightness. A 25% drop would result if water having 6.5 grams/liter of dissolved solids was used to deink with. A higher amount of dissolved solids can be tolerated in the washing water then could be tolerated in the cooking liquor. The cooking liquor seems to be extremely sensitive to dissolved solids content of the water.