The aim of the research was to propose new ways of quality evaluation of granular blends. The object of observation was the vetch-mustard material pair, which was mixed using the supporting inserts (RSI) and achieved different mixing state. Differences between theses states resulted from differences in ways of packing of vetch seeds in bins. A material arrangement in three mixing states was researched using the computer picture analysis and an evaluation of variances of seeds’ distributions was performed for chosen bin profiles. The results were compared and not previously used indicators for longitudinal and transverse mixing shapes were proposed in the analysis. A non-appropriateness of the Rose’s and other mixing measures as well was indicated in the paper.

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