Colour fading effect of indigo-dyed cotton denim fabric by CO2 laser

In this study, denim fabric was treated with CO₂ laser under different combination of laser process parameters, i.e. resolution and pixel time, in different irradiation directions, i.e. warp and weft directions. Experimental results revealed that the laser power increased with increment of resolution and pixel time. The colour fading effect was increased with the increase of laser power but an optimum colour fading effect was achieved. Meanwhile, the colour levelness of the laser treated denim fabric was good according to quantitative measurement. However, it was noted that the direction of laser irradiation did not affect the colour fading effect and colour levelness.