Printability of bio-composite sheets made from paper mill and cardboard mill waste sludge.

Purpose: The purpose of this study is to reveal the usability of waste paper sludge on the production of composite materials and the printability of their surfaces were investigated. Design/methodology/approach: First, composite plates were produced by using dried and milled waste sludge together with polyester resin and epoxy. Screen printing using water, solvent and UV-based inks were carried out. Findings: It was determined that UV and solvent-based inks in both resin groups were permanently attached to the surface of composite plates produced using paper mill waste sludge, while it was found that the adhesion was not achieved sufficiently in cardboard factory waste sludge. Originality/value: The unique aspect of this study is obtained the composite plates from paper mill and cardboard mill waste sludge and improved the printability of them. [ABSTRACT FROM AUTHOR]