Inkjet ink behaviors and its implication in adsorption deinking

ABSTRACTThe deinking process of inkjet deinking was evaluated by following INGEDE Method 11 and the influence of the pulping chemistry was studied. The inkjet ink behavior during pulping and papermaking was also investigated to distinguish between redeposited ink and bound ink, which has shown that redeposited ink is the major concern during paper recycling. In order to prevent the ink redeposition, adsorption has been used to improve inkjet removal during pulping. Chitosan was selected as an effective adsorbent, and the ISO brightness was improved by 5 points compared with flotation deinking.