Abstract
The residue of 1, 2, 4-trichlorbenzene, used as a carrier for the dyeing of the polyester fibers has been examined when it gradually vaporizes and elutes from an inside or surface of polyester dyed cloth. The correlation has also been studied between the quantity of the residue and the degree of skin irritation by the Evaluation Method (the Kawai's Method) of skin patch test based on the microscopical observation.
The result has revealed that because of the variation in the thrmochemical combination, 1, 2, 4-trichlorbenzene is relatively unelutable from an inside of the fiber at a low temperature, even though it is relatively vaporizable compared with other carriers.
Through the skin irritation test by the Kawai's Method, the correlation between the quantity of the residue contained and skin irritation was observed. As the quantity of the residuedecreased, skin irritation also decreased, i, e., positive at 10, 000 ppm and almost negative at 860-2, 000 ppm. The fact that the degree of skin irritation was the same at 860 and 0 ppm, has been assumed that the skin irritation by the carreer at less than 860 nom is almost undistinauishable from nhvsical irritation by nolvester cloth.
