抄録
The effects of extension of wool fibers on the dyeing rate have been examined using C. I. Acid Orange 7 in an acidic dyebath. The apparent rate of dyeing increased with an increase of extension ratio. From the relationship between the relative dye exhaustion and the square root of dyeing time, it was found that the initial dyeing behavior which was remarkably affected by extension contributed to the increase of the apparent dyeing rate. The scanning electron micrographs of extended wool fibers showed that the cusps of the cuticle cells were curved upward and the gaps between cuticle cells were enlarged. Therefore, it seems reasonable that the increase of the initial dyeing rate is due to the rough and porous nature of the surface layer responsible to the morphological changes in the cuticle layer.
