Almost every interior textile (carpet, rugs, upholstery, draperies, and wall coverings) will lighten in color or fade over a period of time. The extent of damage depends on the item's location, exposure to light and elements, color, intensity, type of dyes, and the dyeing method used.
An interior textile that has been solution-dyed (or producer-colored) is least susceptible to sunlight fading. The pigments are added to the polymer before the fibers are formed, sealing in the color. Most olefins (polypropylene and polyethylene), many acrylics, and some polyester and nylon fibers used in carpet are dyed using this method...
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