There is a nice definition of yarn count according to textiles institute of UK, “a count is a number of indicating the mass per unit length or length per unit mass of yarn of yarn”
In other words, Count can be defined as, the numerical values which express the fineness or coarseness of yarn. It indicates the relationship between length and weight also.
So, “Yarn count is a number which indicates the mass per unit length or the length per unit mass of the yarn”
Indirect yarn count system or numbering system
Classification of Yarn count
Study my another article about direct yarn numbering (direct count) system
Indirect count (length/weight)
The length of a fixed weight of yarn is measured. The length per unit weight is the yarn indirect count. General features of all indirect count systems are the weight of yarn is fixed and the length of yarn varies according to its fitness.
Points should remember during the indirect count
- In indirect count system weight is fixed.
- Higher the yarn number finer the yarn and
- Lower yarn number coarser the yarn.
The following formula is used to calculate the indirect yarn count
N = Yarn count or numbering system
W= Weight of the sample
L = Length of the sample
l = Unit of the length of the sample
w =The unit of weight
Some indirect yarn count system
- English count system, Ne: No of 840yd lengths per pound
- Metric count, Nm: No. of kilometers per kilograms
- Woolen count (YSW): No. of 256 yd lengths per pound (lb)
- Woolen count (Dewsbury): No. of yd lengths per oz
- Worsted count, Nek: No. of 560 yd lengths per pound
- Linen count, NeL: No. of 300 yd lengths per pound
English count indicates how many hanks of 840 yards length weighs one pound.
That means, if count 40 Ne, then it means 40 hanks (bundle) of 840 yards will give 1 pound weight.
(Note: So, for gaining 1 pound weight, 840 yards long how many yarn bundle we will in need, this requires a number of bundles are the English count of this yarn.)
Here count 40 Ne means, 40 bundles of yarn with 840 yards length will be required to get 1 pound to weigh.
Engineer Sheikh Nurja
B.Sc Engineer of Textile