CHANGE IN COLOR OF DYED ARAMID FABRICS BY SPUTTER ETCHING

The aramid fabrics Technora and Conex, dyed with Cl Disperse Yellow 54 , Cl Disperse Red 60 and Cl Disperse Blue 56, were treated with sputte r etching and argon low-temperature plasma. The colour depth of Techno ra was considerably increased by sputter etching, whereas that of Cone x was not. Changes in colour were investigated by the L, C*, h colour system. The increase in colour depth due to sputter etching was great ly dependent on the decrease of metric lightness L and the increase o f metric chroma C.