Direct system
Tex: Count
in the Tex system is the weight in grams of 1000m or 1km of yarn.
From an example we will understand it easily.
If the weight of 3000meters
yarn is 2.5grams, then what will be the count in Tex for the yarn?
We know that Tex is
calculated in direct system. For direct system, Count, N = (W×l)/L
Where,
N = The yarn number or
count.
W = The weight of the
sample = 2.5gm
L = The length of the
sample = 3000m
w = The unit of weight of
the system = 1gm
l = The unit of length of
the system = 1000m
Now, Count, N = (W×l)/L =
(2.5×1000)/3000 = 0.83
So, count is 0.83Tex.
Denier: The
number or count in the denier system is the weight in grams of 9000m or 9km of
yarn.
Pounds per spindle: The
yarn number or count in the pound per spindle system is the weight in pounds of
14400 yards of yarn. This count is used for jute.
Millitex: Count
in Millitex system is the weight in milligram of 1km of yarn.
Kilotex: Count
in the kilotex system is the weight in kilogram of 1 km of yarn.
Wollen: Count
in wollen system is the weight in grain of 20 yards of yarn.
Indirect system
English count: The
yarn count is defined as the number of hanks of 840 yards per pound. We should
know that, the length of 840 yards yarn is called 1 hank. By the same way, 2520
yards yarn is equal to 3 hank.
If one pound of yarn
contains 30 hanks of 840 yds, then in English system count will be 30 Ne. It is
denoted by Ne. Here, length of the 30Ne yarn is (840×30) = 25200 yds as hank is
30 and unit length is 840yds.
For example, If the weight
of 3000meters yarn is 2.5grams, then what will be the English count for the
yarn?
We know that English count
is calculated in indirect system. For indirect system, Count, N = (L×w)/(l×W)
Where,
N = The yarn number or
count.
W = The weight of the
sample = 2.5gm = 0.00551lb
L = The length of the
sample = 3000m = 3270yds
w = The unit of weight of
the system = 1lb
l = The unit of length of
the system = 840yds
Now, Count, N = (L×w)/(l×W)
= (3270×1)/ (840×0.00551) = 706.5 Ne.
So, count is 706.5Ne.
English count is used for
cotton.
Metric: It
is defined as the no of hanks(1000m) per kg e.g. if one kg of yarn contains 40
hanks of 1000m, then in metric system count will be 40 Nm. It is denoted by Nm.
Worsted: It
is defined as the number of hanks(560yds) per pound e.g. if one pound of yarn
contain 30 hanks of 560 yds, then in worsted system count will be 30 worsted.