Color Change

Dyes are chemical compounds added to fibers to give them color. Sometimes these dyes react with chemicals or gases and changes in the color occur.

Fume fading is a reaction to gaseous pollutants, such as oxides of nitrogen or sulfur, in the air. It is a gradual change, accelerated by sunlight, heat, high humidity and the presence of acid on the fiber. The most common color changes are blues to pink, greens to yellow, and browns to red. The color change usually starts at the tips of the tufts and progresses toward the backing.

Ozone fading is caused by...

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