**Neps Count:**

Nep count is the number of neps per 100 square inch of card web forming a standard hank of the sliver of 0.12 Ne on a 40-inch wide card. In this article, we will know how to calculate neps count from the card web.

Before we know how to calculate it, we have to know **what is neps?**

**Neps:** Neps are considered small tight balls of entangled fibres. That’s leading to the downgrading of yarn and fabric. The cross-sectional size of neps is +140 to +400% of normal yarn and its fault length is 1 mm.

**Classification of Neps**

For cotton fiber; there 5 types of Neps. They are as:

**Process Neps**: Produced by faulty carding or up to spinning yarn.**Mixed Neps:**Fiber tangle around foreign materials.**Immature Neps:**Formed by processing immature fiber.**Homogeneous Dead Neps:**A tangle of nearly all dead fibres.**Fuzz Neps:**Fault of short fuzz fibers.

Nep count is the no. of neps per hundred square inches of card web forming. To calculate nep count, at first, a web is collected from the card and placed on a 10 inch X 10-inch blackboard. Then the neps are counted and the number of neps found is corrected for any difference in hank or cord width. Nep count is generally expressed by n.

**How to Calculate the Neps Count from Card Web**

Mathematically, n = m X 100

Where, m = No of neps per inch 2 card web

**Problem: 1**

A 42” wide card web of multiplying 100 of the mean value per square inch. Calculate the nep count of that card web.

**Solution:**

Nep count, n = m X 100 = 0.13 X 100 = 13 (ANS)

**Problem: 2**

4 kilotex is produced from a web of card width 38” after testing 5 cells web formed to contain nep. Calculate nep count.

**Solution:**

Sliver hank = 4 Ktex = 590.6/ 4000 Ne = 0.14765 Ne

Card width = 38”

No. of cells = x = 5

………log10N – log10 (N-x)

m = …………………………………

……………….log10 e

….log 10 34 – log 10 (34-5)

= ……………………………………

…………….log 10 e

= 0.159

Nep count, n = m X 100 = 0.159 X 100 = 15.90 (ANS)

Author of this Artice:M. Hossen UzzalProduction Officer Monno Fabrics Ltd., Manikgonj Email: [email protected]