We recommend to make five measurements per measurement patch and take the
average value in order to level out measurement deviations caused by inhomogeneous
percentage patches due to the production process of the FMB. The averaged
measurement results of SpectroPlate have to be within the following tolerances:
AM screen (periodic): ± 0,5 %
FM screen (non periodic): ± 1,0 %
If the measurement results are out of tolerance, make a white calibration and try
again. If the values are still out of range, it is necessary to perform a screen calibration
on a Fogra Measuring Bar FMB.