Paper ID: 125
NEW TECHNIQUES FOR IMPROVING THE QUALITY OF COTTON YARN USING NATURAL DYES FROM TEAK LEAVES (TECTONA GRANDIS), KETAPANG LEAVES (TERMINALIA CATAPPA), AND TENDER SKIN (LANNEA COROMANDELICA)
Susi Rahayu1), Dian W. Kurniawidi1), Lalu S. Hudha2), Siti Alaa1*)
1) Material Physics Research Group, Physics Department, Universitas Mataram
2) Instrumentation Research Group, Physics Department, Universitas Mataram
Sade village woven fabric is one of Lombok’s superior woven fabrics. The process of producing this woven fabric is still traditional by using yarn spun from cotton. The purpose of this study is to obtain the optimal strength of cotton yarn using natural dyes. The yarn coloring process is carried out in three stages, namely mordan, coloring, and fixation. Mordan stage and fixation using alum solution. The coloring stage uses teak leaves, ketapang leaves, and banten skin. All three ingredients are dissolved in water with concentrations 1:10, 1: 8, and 1: 5. In the mordan stage, 8 grams of alum is dissolved in 1 liter of water. While at the fixation stage, 50 grams of alum is dissolved in 1 liter of water. This study shows that teak leaves produce a dark brown color, ketapang leaves produce turmeric yellow color, and banten skin produces a brick red color. After going through the coloring process, the yarn is tested using Tensilon RTG 1310 with the ASTM D2256 test standard. The result show that the yarn strength increase during the coloring process. In addition, differences in the concentration of the solution also affect the strength of the yarn produced. Solution with a concentration ratio of 1: 8 produces optimal tensile strength of 0.3450 cN / dtex on teak leaves, 0.3369 cN / dtex on ketapang leaves, and 0.2450 cN / dtex on banten skin.