Yarn Manufacturing Technology Related Viva-1 : Question about "Count or Yarn Count"

What Is Yarn count:
Count is a numerical expression which defines its fineness or coarseness.
Definition by Textile Institute:
“Count: A number indicating mass per unit length or length per unit mass of yarn.”

What Types of  Yarn numbering/counting  systems:There are two basic systems of yarn numbering:
1.    Direct system (mass per unit length)
2.    Indirect system (length per unit mass)

1.Direct system:
In a direct yarn counting system count is the weight of a unit length of yarn.
Let,
N= Yarn number or count
W= Weight of sample
L= Length of the sample
l= unit of length of the system
Then,
N =     W x l
              L
Example of direct systems: Tex, millitex, kilotex, Denier, Jute etc

2.Indirect system:
In an indirect yarn counting system count is the unit of length per unit of weight of yarn.
Let,
N= Yarn number or count
W= Weight of sample
L= Length of the sample
l= unit of length of the system
w= unit of weight of the system
Then,
N =     Lxw     
            lxW
Example of indirect systems: Cotton (Ne), Metric (Nm), Worsted etc

What is count(Ne): It is defined as the length in hank of 840 yds per pound of yarn.
What is 30 Ne: It is defined as the 30 hank (840x30 yds) of length per pound of yarn.
What is Tex: It is defined as the weight in grams per km of yarn.
What is Millitex: It is defined as the weight in milligrams per km of yarn.
What is Kilotex: It is defined as the weight in kilograms per km of yarn.
What is 10 tex: It is defined as 10 gm of weight per km of yarn.
What is 110 denier: It is defined as 110 gm of weight per 9 km of yarn.

What is Unit of Length & Weight(mass) in Direct counting system:

Name of the System	Unit of mass	Unit of length
Tex	gm	km
Denier	gm	9km
Jute	Pound(lb)	14,400 yards (spyndle)

What is Unit of Length & Weight(mass) in indirect counting system:

Name of the System	Unit of length	Unit of mass
Cotton (British or English)	840 yards(hank)	Pound(lb)
Metric	km	kg
Worsted	560 yards (hank)	Pound (lb)

Posted in: Count,Textile,Textile Viva,Yarn Count