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