Nita Kusumawati, Toeti Kostiari, Agus Budi Santoso
Generally, the purpose of this research is to obtain optimum conditions of the mori fibers dyeing process using indigosol. More specifically, this research aimed to determine the influence of the washing process using Turkish Red Oil (TRO) to color quality produced from dyeing process using indigosol dye and also the leaching percentage that was produced. To achieve that goal, on this research has been done washing process of mori fibers using the Turkish Red Oil (TRO), with a variation of soaking time 2; 4; 6; and 24 hours. An analysis of the reflectant percentage is carried out to determine the intensity of dyeing for each variation of soaking in the TRO and the difference in color between dyeing quality which resulting from mori dyeing that not through washing process and through a washing process. Based on the results obtained from reflectant measurement using DRUV instrument, mind that before leaching process indigosol green dyes have the highest compatibility level with mori fiber, which respectively reached 97,60%, after immersed in the TRO for 24 hours. This color intensity is 2.93% higher compared to the indigosol green color intensity on the mori fiber which not through the washing process before dyeing. While the lowest compatibility level with the mori fiber generated by indigosol violet dye, where the color intensity obtained is 84.21% for mori fiber which has been immersed in TRO for 24 hours. This color intensity is 34.46% higher compared to the indigosol violet color intensity on the mori fiber which not through the washing process before dyeing. After leaching process, known that despite the color intensity of indigosol green on the fiber is the highest, but the fade resistance level of indigosol yellow dye is the highest. The fade level average of indigosol dyes are of 0.61%; 9.97%; 11.70%; and 16.10%, respectively for the indigosol yellow, indigosol green, indigosol violet, and indigosol pink dyes. Thus, it can be said that the color generated by the indigosol yellow has the most excellent fade resistance. In the meantime, based on the results obtained from the mechanical strength measurement using the autograf instrument, note that the value of Young's modulus will be smaller when the mori fibers washing process carried in the longer time. Based on the mechanical strength data also, it can be seen the mechanical strength of colored mori fibers which not immersed on TRO are in the range 12,406.68 N/m2 - 22,272.48 N/m2,while the mechanical strength of colored mori fibers which was immersed on TRO 2 hour, 4 hour, 6 hour, and 24 hour, each are 9,344.29 N/m2 - 14,518.38 N/m2; 9,219.61 N/m2 - 14,038.71 N/m2; 4,399.34 N/m2 - 11,216.53 N/m2 and 3,161.97 N/m2 - 10,900.14 N/m2.
Chemistry Departement, Surabaya State University, Surabaya, Indonesia; Electrical Engineering Departement, Surabaya State University, Surabaya, Indonesia
