How to Find Yarn Count
Last Updated: Wed 15, 2022
Yarn count is basically a number that represents the fineness or coarseness of yarn. Also notified by the idea of mass per unit length or length per mass unit.
There are 2 systems to learn how to find yarn count –
In this system, count is determined from the idea of length per mass unit. Here, the length of the yarn is fixed and the mass is varying. The higher the count coarser the yarn gets.
The direct system is used for –
The formula for determining yarn count –
Direct count, N = W x l / w x L
W= Sample weight
l= System length
w = System unit weight
L= Sample length
In this system, count is determined from the idea of mass per length unit. Here, mass of the yarn is fixed and the length is varying. The higher the count finer the yarn gets –
It’s used for –
Formula for determining yarn count –
Indirect count, N = w x L / w x l
N = Count
W = System unit weight
L = Sample length
W = Sample weight
l = System length
To calculate yarn count we’ll require these things —
As the moisture content is subjected to change, we should test the material in a standard atmosphere. Otherwise, the weighing may produce erroneous results.
The humidity should be around 65% ± 2%, and the temperature should be around 20°C ± 2%.
|Sample no||w = System Unit Weight||L= Sample Length||W= Sample Weight||l= System Length||N= w x L / W x l||Average Yarn Count|
|1||1 lbs.||840 yds.||0.028 lbs.||840 yds.||35.71||38.5738|
Count, N = w x L / W x l
= 1 x 840 / .028 x 840
Yarns are measured upon their dimensional properties. The length and weight play and vital role in determining yarn count, which you need to know for determining the fabric gsm or to know if they will be useful for your use case. For example, when you’re looking for placemat yarns, it needs to be if you need compactness.
Sometimes moisture or drying process may change the actual count calculation. Hope you have learned how to find yarn count now.