Application Note: Opacity Compensation For Paper Using The SpectraProbe XE

The opacity of paper can affect its color. For single-sheet measurements in particular, a change in opacity results in a change in color. When taking color measurements in a laboratory using a benchtop instrument, a "stack" is created by folding the paper a number of times until it appears opaque. However, an on-line instrument viewing paper as it is manufactured can only measure a single thickness of paper as it passes under the sensor, so the color values may be different than those obtained from a benchtop instrument because the opacity is different.

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