Proses Bleach Washing pada Kain Denim yang Dicelup dengan Zat Warna Indigo Menggunakan Natrium Hipochlorit (NaOCl)

The process of bleach washing on denim fabrics produces a paler or lighter shabby effect. effect is produced by using an oxidizing agent. application sodium hypochlorite can cause decrease in color aging and high tensile strength. pH condition also affects the occurrence oxycellulose damage which will affect final result. Inappropriate very oxidation produce less Therefore, concentration NaOCl must be adjusted properly so that optimal results are obtained. purpose this study was to determine optimum hypochorite (NaOCl) physical properties fabric. After experiment carried out, test out based two-factor Anova statistical data visual fabric were obtained at 2 g/L alkaline (10-11). values as follows: fastness rubbing 3-4 for dry, 2-3 wet, strength 67.4 kg warp direction, 43.1 weft stiffness direction 430.48, 344.54. factory standard 65 40 3 dry wet rubbing.
 Keywords: washing, denim, hypochlorite, oxycellulose, fastnes