For the purpose of effectively using onionskin, which is a dyeing material, we examined repeated uses of a dyeing solution and dyeing material, both after refrigeration and frozen storage. Colorimetric values of the dyed fabrics were determined, and visual inspections were carried out to determine whether it would be possible to use the fabrics as teaching materials. Through a comparison of the L*a*b* value and the Munsell HVC value of dyed fabrics, all numerical differences between each dyeing condition were found to be small. Moreover, even if dyeing conditions differed, it was possible to identify the dye mordant of a dyed fabric by visual inspection. From these results, the change in color of the dyed fabrics used in this experiment was determined to be within an allowable range in order for the fabrics to be used as teaching materials. Furthermore, the quantity of dyeing material required for one dyed fabric was measured. As a result, under the most efficient dyeing conditions, it was found that for onionskin only 25% of the standard amount was required.
