ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Rheoviscometry of Offset Inks and their Emulsions with Water

J. Kindernay, J. Panák, and M. Mikula

Department of Graphic Arts Technology and Applied Photochemistry, Faculty of Chemical Technology, Slovak University of Technology, SK-812 37 Bratislava

Abstract: A stress-controlled rheometer with cone and plate geometry was used to study the rheological properties of four sets of process offset inks and their emulsions with low water content. All systems have shown typical pseudoplastic shear-thinning behaviour. Because of some measuring problems concerning a remounting of inks from measuring gap, the flow curve was properly segmented and the optimal measuring interval ∆D_opt was defined. The Ostwald flow model was chosen as the best from three applied mathematical models. Finally, the quantitative how parameters were calculated and discussed in connection with ink press performance.

Full paper in Portable Document Format: 551a15.pdf

Chemical Papers 55 (1) 15–22 (2001)