The Effects of Different Applications with Deinking Treatment on Optical Properties of Paper

In this study, on office papers firstly black laser printing was applied and the deinking treatments were carried out on these papers. In the second step, printed papers were repulped using Hobart mixer under different conditions and the suspensions were prepared. In the stages pulping and the suspension preparation, different level of chemicals and enzymes were added and their effects were analysed. The effect of ultrasound was also studied . In the final stage, the waste paper pulp treated were completely tried to purify from the deinks taking the flotation deinking method. In the last of process, optical analyses on the test papers obtained were made. At the end of the study. It was seen that ın generally enzymes and pulp have a positive effect on whiteness and brightness