Various non technical tests are
conducted to establish the fiber content and the blend. Since every time one
cannot make the fiber undergo laboratory testing and analysis, so certain
significant non technical fiber tests are performed.
Non technical testing does not require any special equipment or setting for
identification of fiber. The tests are useful and simple to perform and also
provide ready identification under certain circumstances.
Types of Non Technical Tests
test involves moving the sample of fiber to be tested, slowly towards a
flame and then the reaction should be carefully observed.
Following steps should be performed:
- One end of the sample should be put in flame to determine its burning
rate and characteristics.
- The sample should be removed from the flame and the Brining
characteristics should be continuously observed, together with the
- After the sample has cooled down, the ashes should be examined for
the amount formed, harness and color.
The test involves feeling the fabric and requires skilled perception of the
person testing the fabric. The If a person places a skill to "feel the
fabric" correctly is acquired with experience. For example if a person
places his finger on a sample of cotton or linen, the heat generated by the
finger, passes off because the fibers are conductors of heat. The fabrics
will therefore feel cool to the touch.
Different man made and natural fibers can be tested including:
The above steps should be performed, in case the fabric is made from a
single yarn, if however, the fabric is a blend of two or more fibers, or
yarns, then the lengthwise yarns should be separated from the cross wise
yarns and each set should be tested separately.