| 摘要 |
PROBLEM TO BE SOLVED: To provide particle suspension for circularity calibration capable of measuring more precise circularity, when the circularity of a non-spherical particle is measured, and to provide an analysis method that uses the same. SOLUTION: The particle suspension for circularity calibration, used for calibration of a particle image analysis device for calculating circularity, from a particle image that a particle is imaged from a first view point, is used for the calibration of circularity, when a toner particle is measured and contains camellia pollen; since camellia pollen has very uniform and little variations with respect to the size and shape, it can be used stably for particles for circularity calibration. Additionally, camellia pollen is measured near average circularity of 0.91, with good reproducibility which approaches the average circularity of toner particles of 0.90 to 0.95. Accordingly, the circularity of toner particles can be measured more accurately. COPYRIGHT: (C)2009,JPO&INPIT
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