Chemical test is yest another type
of technical test for identifying the fibers. These test are not intended
for general consumer.
Types of Chemical Tests
Stain Test: Also known as the Double barrel
fiber identification (DBFI), the test is based on the theory that each fiber
has its own distinct two- color reaction when treated with stain.
A fiber will turn to a particular color in the presence of dilute acetic
acid and to some other specific color when stained in the presence of a mild
alkali.
Solvent Test: The test involves treating the
fibers in certain solvents for identifying them. The technical test is
becoming difficult to conduct as fibers chemically similar fibers and their
blends are being manufactured. There is no individual chemical or solvent
test for separating or identifying the fibers in combinations.
