Abstract
Increase in the utility rate of waste paper is one of the most important subjects that is proposed as “Recycle target 56” by JPA (Japan Paper Association).Deinkability of prohibitive materials for recycling was examined with carbon paper. We evaluated the deinkabilities of old newspaper/carbon paper mixture, woodfree paper/carbon paper mixture and 100% carbon paper. In conclusion, we have found that following three technical conditions enable the deinkability of carbon paper to emerge.1. Control of ink particle size in pulper stage2. Increasing of foam volume with foaming agents or air blow3. Improvement in washing stage and water treatment stage
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