SAMPLE FOR CALIBRATION OF FIBER ORIENTATION MEASURING DEVICE

PROBLEM TO BE SOLVED: To provide a sample for calibration of a fiber orientation measuring device for calibrating the value showing the fiber orientation measured by each fiber orientation measuring device in consideration that it is inconvenient that the reference value changes between the front and back surfaces when the fiber orientation measuring devices simultaneously measures the fiber orientations of the front and back surfaces of paper. SOLUTION: A sample having known fiber orientation angle or/and fiber orientation strength is set as the sample for calibration, and the measured data by the fiber orientation measuring device to be calibrated is calibrated by measuring the fiber orientation angle and fiber orientation strength of this sample for calibration. The reference values of the fiber orientation angle and fiber orientation strength of the sample for calibration are obtained by a direct method of measuring the number of fibers or an indirect method of measuring it with an optional fiber orientation measuring device. The calibration curve of the measured values of the orientation angle and orientation strength of the sample for calibration and measured data of them is determined, and the calibration is performed. COPYRIGHT: (C)2011,JPO&INPIT