Benefits
There is experimental evidence to demonstrate that naturally pigmented cottons, especially green cotton, have excellent sun protection properties, when compared with unbleached white cotton that needs to be treated with dyes or finishes to obtain similar properties. It is hypothesized that the pigments in naturally pigmented cotton fibers are present to provide protection from ultraviolet radiation for the embryonic cotton seeds, however they can also provide protection from the sun’s harmful rays for consumers who wear garments manufactured from these naturally pigmented fibers. The UPF values of the naturally pigmented cottons examined in a university study remained high enough, even after 80 AFUs (AATCC Fading Units)of light exposure and repeated laundering, that the fabrics merited sun protection ratings of “good” to “very good” according to ASTM 6603 voluntary labeling guidelines for UV-protective textiles.
Read more about this topic: Naturally Colored Cotton
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