Abstract
The effects of humidity, temperature, and ozone concentration on the ozone fading of a number of blue anthraquinone dyes on nylon yarns have been studied before and after steam heat-setting. Disperse and basic dyes were found to be sensitive to the presence of atmospheric ozone at high humidity, whereas acid dyes were, in general, less sensitive. The rate of fading varied for different dyes within each of these three classes. The effect of fiber properties on the degree of fading was also studied, and the results illustrate the importance of dye diffusion in the ozone fading phenomenon.
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