The conservation of works of quilt was investigatedfrom standpoint of evaluation of their fading caused by environmental pollution and light radiation. The characteristics of Japan Industrial Standard blue ribbon in comparison with present and proposed AATCC blue ribbons on exposure of oxides of nitrogen and wavelength sensitivity of AATCC blue wool lightfastness standards under light radiation. Blue ribbons dyed with Disperse Blue 3，Di sperse Blue 56 and Disperse Violet 1 were examined by exposure to different times by concentrations of oxides of nitrogen. The results indicate that Disperse Blue 56 may be more appropriate than Disperse Violet 1，be cause Disperse Blue 56 fading was moderate whereas Disperse Violet 1 faded too rapidly. Moreover，the lightfastness of the AATCC Blue Wool L2 and L4 standards was examined with respect to wavelength sensitivity. Both Blue Wool Standards displayed peak maxima at 245 and 294 nm. The results indicated that UVA and UVB had as ignificant fading effect，wh ereas visible light caused fading to as ma11e xtent. It is an experimental evidencethat the standards would unlikely response to sun light intensity at every wavelength. Specific wavelengths caused Blue wool to significantly fade，suggesting that the total irradiated UV energy may not be an appropriate index
