The effects of coated magazines on deinking of newsprint after pulping andflotation

The authors examined the furnishes of mixed magazine and newsprint to inves tigate changes in properties of recycled fiber during different stages of d einking. The explanation for these changes in the change in proportion of m echanical and chemical fibers, filler, fines, and ink during flotation. Aft er the pulping stage, detrimental effects of filler from magazines influenc ed the trends in strength properties. After the flotation stage, enhancemen t 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 newsp rint. Extended periods of flotation time did not show a significant effect on properties of recycled fiber.