Study of Parameters Affecting Dry and Wet Ozone Bleaching of Denim Fabric

摘要

The present research is related to a recent eco-friendly technology in a denim laundry that relies on ozone oxidation of indigo. In this work, denim fabric was treated with ozone at different values of ozone concentration, moisture content and time of exposure to ozone. The fading increased with the increase of the various mentioned factors. Residual products of the indigo oxidation by ozone, the cause of the yellowing observed on the surface of the fabric were identified through spectrophotometric measurements, pH variation and FTIR analysis. Ozone effect on mechanical properties of the fabric was studied through the measurement of ultimate tensile strength.