Some Fluid Dynamic Aspects of the Wicking Action of Silicone Oils on Paper.

The roll-inclined plane viscometer technique was used to study the fluid transfer of silicone oils of variable viscosity onto paper. The transfer involves the phenomena at liquid-film splitting, spreading and penetration. This represents complicated fluid dynamics that exists in coating or ink transfer. The purpose of this study was (1) to reappraise the value of the roll-inclined plant technique in characterizing viscosity of fluids in relation to film transfer, (2) to analyze the effect of polymer and filler modifications of paper on the liquid transfer performances of standard fluids, and (3) to search for identifiable correlations between variables of fluid and paper properties with wick log and spreading action of free drops of standard oils on different papers. Some hypotheses are proposed suggesting relevance of these rather simple measurements in selecting diverse papers for printing tests.