Final answer:
Fiber dye is the most colorfast way to dye natural fibers as it involves dyeing the fiber itself before it is spun or woven into fabrics.
Explanation:
Fiber dye is the most colorfast way to dye natural fibers as it involves dyeing the fiber itself before it is spun or woven into fabrics. The color is embedded within the fiber, making it more resistant to washing and light exposure. An example of this is dyeing wool before spinning it into yarn.
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