Fiber identification is an important element to the way designers, and the automotive industry, amid others. It may vary alongside industries as well as method. Now mod technology is used to identification of fiber. But sometimes, sometime method is the best from modern technology. Those who are related to cloth industry, particularly for cloth engineers and fashion designers have to know about fiber identification. In this article I accept briefly described nearly method of identification of natural fiber like every bit cotton wool, jute, flax, wool, silk fiber.
|Fig: Fiber identification examination|
Identification of cotton wool fiber:
There are different tests which could live used for the identification of the cotton fiber. It is suggested to combine at to the lowest degree ii or more unlike methods to attain an acceptable and reliable conclusion inward practise.
Non technical testing does non postulate whatever especial equipment or setting for identification of fiber such equally:
- Feeling examination
- Burning exam
Feeling test: Unresponsive, shine and a soft manus to human being peel, feels skillful against pare.
Burning examination: The reaction of fibers to estrus from an open fire is a useful direct inwards identification of fibers. Not melt, burn, odor like paper burning. The scent of cotton fiber burning is similar of newspaper burning because newspaper is besides a cellulosic material.
Some technical tests are required for details identification of fiber:
- Microscopic identification
- Chemical exam
- Coloring amongst dyestuffs solution
- Solubility test
Microscopic identification: Kidney shaped cross-section in addition to natural convulation of longitudinal sentiment easily identified cotton fiber.
Solubility: Cotton is easily dissolved past H2SO4.
Identification of jute fiber:
There are unlike tests which could be used for the identification of the jute fiber.
- Feeling test: Stiff together with a harsh manus to man peel, feels bad against skin.
- Burning exam: Not melt, burn easily, odor similar paper burning, because newspaper is besides a cellulosic material.
- Microscopic identification: Polygonal shaped cross-section and many ultimate cell of longitudinal sentiment identified jute fiber.
- Solubility: Jute is dissolved by H2SO4.
- Staining: To report the morphology of fiber surface.
Identification of flax fiber:
Following tests are done for identifying flax fiber.
- Burning exam: Combustion quick, brilliant, alongside afterglow.
- Smell: Like burnt paper.
- Residue: Pale gray, powdery ash.
- Microscopic opinion: Flax fiber tin can be identified past longitudinal too cross-sectional persuasion of microscopic.
Identification of wool fiber:
Wool is a protein fiber which is identified amongst unlike exam.
- Physical test: The fire is steady just more difficult to continue burning. The olfactory property of burning wool is similar burning of hair.
- Chemical examination: Wool fiber dissolves inwards concentrated sodium hydro-oxide as well as sodium hypo-chloride as well as tardily dissolves inwards Nitric acid lxx%.
Distinguishing wool from silk:
The use of concentrated cold hydrochloric acid together with sodium hydro-oxide solution volition dissolve the silk only the wool fiber swells.
You tin can besides read: Difference betwixt Wool as well as Silk Fiber
Identification of silk fiber:
Identifying silk fiber by the following methods.
- Burning test: The smell of burning silk is as similar equally horn or hair.
- Combustion: Small flaming, tardily self extinguishing.
- Residue: Black, friable cinder, weighted silk leaves a crystalline ash. Where wool will have the olfactory property of burning pilus just the silk will take a much more disagreeable odour.
- Sulphuric acid: Dissolves, destroyed.
- Lithium hypochlorite: Dissolves.