Dyeing of cotton fabric with natural dye from peristrophe bivalvis extract

Indonesia has high potential for biodiversity of flora as a natural dye. Noja leaf (Peristrophe bivalvis) has potential as a red natural dye. The major component of the extract of its leaf is phenoxazine. The influence of mordant type, mordant concentration, and dyeing process temperature on the performance of the dyeing process was studied. The dyeing performances of the dyeing process were appreciated by measuring the colour strength parameter (K/S). Optimization of the dyeing process was done with Response Surface Methodology (RSM). Colour fastness to sunlight, washing, and rubbing was performed. Dyeing with noja leaf extract was done on a water bath with variation of mordant type used was alum (potassium aluminium sulphate), ferrous sulphate and calcium oxide with variation concentration 5%, 10%, and 15 % of the weight of the fabric at temperature variations of 50, 60 and 70°C. The optimum condition of fabric dyed with noja leaf extract is achieved at 61°C using ferrous sulphate as mordant with 10.96% concentration yielding colour strength value (K/S) of 0.597. The results of the sunlight, washing, and rubbing fastness test indicate that the natural dye from the leaves of the leaves is quite good as a natural textile dye.