Chemical Deinking Flotation Efficiency Of Coloured TonerReport as inadecuate

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Acta graphica : journal for printing science and graphic communications, Vol.20 No.1-4 January 2010. -

Recycling of paper printed with colour laser printer xerox phaser 7700 has been investigated in this work. The recycling was performed by chemical deinking with double stage flotation with the usage of anion surfactant. Froths collected by flotation were re-floated in purpose to increase the usage of fibers. The efficiency of first flotation of magenta particles 98.3%, cyan 96.9% and carbon ones 91.5% was calculated from results of the image analysis method. The same method was not effective for the identification of the yellow toner particles. The particle size is important characteristic for flotation efficiency. The efficiency of the first flotation is the best for smallest particles magenta and for them the second flotation is unnecessary, while for bigger toner particles cyan, carbon second flotation is desirable. The efficiency of second abf flotation as a function of each colour cyan 78.0%, magenta 58.6% and carbon 61.4% of particle number detected by image analysis method has shown that double stage flotation is successful method of improving the usage of fibers in recycling process.

Office papers; recycling; chemical deinking; double stage flotation

Author: Željka Barbarić-Mikočević - ; Faculty of Graphic Arts University of Zagreb, Zagreb, Croatia Vesna Džimbeg-Malčić - orcid.o



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