Date of Award


Degree Name

Bachelor of Science


Paper Science and Engineering


The recovery of waste paper has become an operation of tremendous economic importance to the paper industry. In 1948 (7), 21,922,000 tons of paper and board were produced. Waste paper represented 35% of all fibrous material consumed in this production. Deinking plays an important role in the recovery of waste paper. Of the 8,446,900 tons of all types of paper produced in 1943. 12.7% was deinked waste paper stock, while in the same year wastepaper content in board was 61.6%. Most of the waste paper is used in the manufacture of board, by just dispersing the ink in the stock during disintegration, but a substantial amount of the better grades of waste papers are chemically treated to remove the ink.