Section+2.4

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= **~*~Colorfastness:** The ability textile has to retain its original color without fading or running.~*~ =

**__In Cellulosic Fibers:__**
 * ====== __//Cotton//__--> Cotton is very absorbent, so it takes dye extremely well. However, it may also lose its dye quickly through laundering. ======
 * ====== __Flax__ --> As another absorbent fiber, flax also takes and gives dye readily. ======
 * ====== //__Rayon__//--> Rayon's color may crock (transfer from one fabric to another through abrasion) or bleed (leak when wet). ======
 * ====== //__Lyocell__//--> Lyocell may also crock or bleed, more so with age because the fiber begins to break after several launderings. ======
 * ====== __//Acetate//__--> Acetate fades with exposure to sunlight and also fumes. If it is too close to perfume, it may change color; for instance, turn from gray to pink. ======

**__In Protein Fibers:__**
 * ====== __//W////oo////l//__ --> Wool fibers tend to turn yellow with age and exposure to sunlight. ======
 * ====== __//Silk//__--> Repeated exposures to sunlight can cause discoloration in silk. ======

**__In Synthetic Fibers:__**
 * ====== __//Nylon//__--> Nylon is a color scavenger. It can pick up colors from other fabrics' dyes during laundering. Nylon also has low sunlight resistance. ======
 * ====== __//Polyester//__--> Polyester is quite sunlight resistant, and so does not quickly fade. However, it must be heated to extreme temperatures before it will take dye. ======
 * ====== __//Acrylic//__--> Acrylic is extremely resistant to sunlight. It is often used for outside carpet, upholstery, and accessories because its color can withstand the sun. ======

**Test for Colorfastness** Conduct your own experiment to see the results for yourself! {click the link below}


 * NOTE:** Colorfastness information is not usually available for customers when they first purchase textile fabrics; however, the developers of fabrics know the levels of colorfastness in fabrics.

Sources: Bide, M.J., Collier, B.J., & Tortora, P.G. (2009). // Understanding Textiles // (7th ed.). Upper Saddle River, NJ & Columbus, OH. Lewis, M. (2011, 06 30). // ehow.com //. Retrieved from []