The effects of coated magazines on deinking of newsprint after pulping and flotation

The authors examined the furnishes of mixed magazine and newsprint to investigate changes in properties of recycled fiber during different stages of deinking. The explanation for these changes is the change in proportion of mechanical and chemical fibers, filler, fines, and ink during flotation. After the pulping stage, detrimental effects of filter from magazines influenced the trends in strength properties, After the flotation stage, enhancement in all strength properties occurred due to loss of most filler and fines. Ink coefficient influenced the brightness and light absorption coefficient when large amounts of filler were present. No evidence supported the idea that ash components from the magazines facilitate removal of ink from newsprint. Extended periods of flotation time did not show a significant effect on properties of recycled fiber. Application : mechanical fiber, fiber derived from chemical pulp, and filler are the important deinking components of paper recycling.