Yarn count
It is a numerical expression that defines yarn's fineness or coarseness. It also expresses whether the yarn is thick or thin. It is also known as the linear density of the yarn. According to the textile institute, yarn count indicates the length per unit weight or weight per unit length of the yarn.
Types of Yarn count
- Indirect system
- Direct system
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Yarn |
Indirect system
Calculation Formula of Indirect System
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Indirect Count Calculation Formula |
Ne = {1 pound / 840 yards} ✕ {Sample Length (L) / Sample Weight (W)}
Nm = {1 kg / 1000 meters} ✕ {Sample Length (L) / Sample Weight (W)}
Nf = {500 gm / 1000 meters} ✕ {Sample Length (L) / Sample Weight (W)}
Direct System
In this system, the length unit is fixed.
Calculation Formula of Direct System
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Direct Count Calculation Formula |
Tex Count = {1000 meters / 1 gm} ✕ {Sample Weight (W) / Sample Length (L)}
Denier Count = {9000 meters / 1 gm} ✕ {Sample Weight (W) / Sample Length (L)}
Pound/Spindle Count = {14400 yards / 1 pound} ✕ {Sample Weight (W) / Sample Length (L)}
Problem-Solving
Problem: The weight of 100 km yarn is 1 kg. Find out the yarn count in Tex, Denier, and Jute Count?
Solve:
Sample Length (L) = 100 km = (100 ✕ 1000) meters
= (1000 meters / 1 gm) ✕ {1000 gm / (100 ✕ 1000) meters} = 10 Tex
= (9000 meters / 1 gm) ✕ {1000 gm / (100 ✕ 1000) meters} = 90 Denier