Relationship between washing condition and indigo back staining of denim

The experiment of indigo dyr re-staining by collecting residue from washing indigo dyed denim was tested.Through determining the value of white lining,the degree of staining was quantitatively analyzed.The influence of the factors affecting of the staining was researched,such as washing,pH value,cellulase types,surfactant, and washing time. As a result,the main factors affectinf the indigo restaining were cellulase types,surfactant,and washing time,while temperature and pH value were less effect.