The Correlation of Line Quality Degradation With Color Changes in Inkjet Prints Exposed to High Relative Humidity

A test target containing both solid-fill colors and finely cross-hatched line patterns of colors was investigated as a method to correlate macro colorimetric measurements with changes in printed line quality on inkjet media exposed to high relative humidity. The objective was to achieve a single macro measurement technique that can simultaneously rank test samples for both humidity-induced color shift and loss of line quality or edge sharpness. The results show that the inclusion of the cross-hatched line patterns in the test target proved essential to achieve a high correlation with visually observed changes in line quality.