Polarization in the Graphic Arts, Preliminary Report

Can polarization densitometry readings at press site predict dry density better than unpolarized? The paper describes a designed experiment run on a sheetfed press. The effect of measuring wet ink versus dry with and without polarized filter was done at three different ink density levels (high, medium, low) and with two paper surfaces (rough and glossy). Enough data is presented for a reader to replicate or expand the experiment. In addition, some of the practical considerations of doing critically timed measurements in a short time interval are described. While a conclusive answer was not expected, this paper adds information in this matter.