Fibers are usually made of a variety of compounds called chemical fibers.
The main types are polymer and nylon, but other compounds are also available.
The polymer fiber test is the most common type of fiber test and it has a fairly high specificity for detecting chemicals.
But the nylon fiber test has a lower specificity for chemicals.
A chemical fiber test can also be used to determine the concentration of chemicals in a sample.
This test is commonly used to confirm the presence of certain chemicals in hair fibers.
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The article was originally published by the Independent, and it may be republished for free.