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For the application of Jeju scoria scattered around the island as a natural dye, cotton fabrics were dyed with the dyeand their properties were measured including dyeability, colorfastness, antibacterial activity, de odorization efficiency, ultravioletprotection, and far-infrared emission. The dyed cotton fabrics were in yellowish red and optimal dyeing conditions were obtainedwith a colorant concentration of 25%(o.w.b) at a temperature of 80 for the dyeing time of 120 minutes. The ratings of℃colorfastness to light, rubbing, perspiration, and washing were 8, 5, 5, and 4~5 respectively. After 15 wash cycles, colorfastnessremained as much as 4~5 rating. The cotton fabric dyed with Jeju scoria demonstrated excellent antimicrobial activity anddeodorization efficiency of 99.9% and 93.9% respectively. Ultraviolet protection factor was 50+. Far-infrared emission rate andfar-infrared emission intensity were 90% and 362(W/ ㎡ · ㎛) respectively. The Jeju scoria can be introduced as a new colorant forthe natural dyeing of cotton.

A Study on Function of Natural Dyeing with Cotton Fabrics Using Jeju scoria