Hamid Akbarpour - Deparment of Deress and Sewing disign, Technical University(Touhid),Amol.Iran.
Abou saeed Rashidi - Department of Textile Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran.
Mohammad mirjalili - Department of Textile, Yazd Branch, Islamic Azad University, Yazd, Iran.

In this work, a bleached well cotton sample was dyed with Reactive yellow105 dye and subsequently, the dyed sample was exposed to the plasma condition containing Nitrogen gas at 1 and 5 minutes of plasma exposure time, respectively. The effect of plasma on surface morphology fabric was studied by Scanning Electronic Microscope (SEM). CIELab, K/S and %R of samples (treated & untreated samples) were measured by Reflective spectrophotometer and consequently, the experiments shows that the sample dyed with Reactive yellow 105 after being washed, with the increase in the operation time of plasma, its dye fastness decreases. In addition, the increase in plasma operation time at constant pressure would increase the destructing effect on the surface morphology of samples dyed with reactive yellow105. Finally, the Fourier transform Infra-red spectroscopy test showed the effect of plasma operation on determining the dye fastness and the change in existent functional groups in fabric after being washed.

Cotton fabric, Cold plasma, reflective spectrophotometer, scanning electronic microscope (SEM), Reactive yellow105 dye, Fourier transform infrared spectroscopy(ATR-FTIR).