Question

Why is the cross section of a fiber important?

it is a distinctive trait of only natural fibers

It is a distinctive trait of only synthetic polymer fibers

it can vary significantly with the fiber

it provides athe basis for the Beck line

it determines the final color of the fibe

Answers

DrBob222
This may help.
https://dfs.dc.gov/sites/default/files/dc/sites/dfs/page_content/attachments/MAU08%20Fiber%20Cross-Sectioning%20Methods.pdf

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