Considering this case, the five characteristics of fibers, other than color, that could have been used to distinguish the two red fibers include "the curly nature of the fiber."
Other characteristics of fibers that can be found other than the color include the following:
Means of evaluating the difference between the two red fibers are microscopy, infrared spectroscopy, micro-spectrophotometry, and ultraviolet light examination.
Hence, in this case, it is concluded that there are many ways in which fibers of the same color can be distinguished.
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