**Sewing thread consumption: **

For disciplined garments costing, it’s a very important issue to know sewing thread consumption. For making a garment, the needed amount of sewing thread or making seam is called sewing thread consumption. In this article, we will discuss how to calculate the amount of sewing thread consumption according to stitch types.

Thread consumption varies from stitch types to stitch types.

**Classification of stitch:**

- Stitch type-101(Single-needle chain stitch)
- Stitch type-301(single needle lock stitch)
- Stitch type-401(single needle chain stitch)
- Stitch type-504(three thread overedge stitch)

We need to remember four theoretical equations for determining actual thread consumption for sewing 1 inch or making 1 inch of seam.

**<<For stitch type-101>>**

Thread consumption (C) = 3 + 2TS

**<<For stitch type-301>>**

Thread consumption (C) = 2 + 2TS

**<<For stitch type-401>>**

Thread consumption(C)= 4 + 2TS

**<<For stitch type-504>>**

Thread consumption (C) = 3 + 4WS + 4TS

Here,

T = Seam thickness

S = Stitch density

W = Seam’s width

**Calculate Amount of Sewing Thread Consumption**

**Mathematical Problem:-01**

If the thickness of seam 0.005 and stitch number per inch is 9, Determine thread consumption for stitch type-101?

**Solution:**

Given that,

The thickness of Stitch (T) = 0.005

Stitch density (S) = 9 per inch

Thread consumption =?

We know , For stitch type-101

Thread consumption = 3 + 2TS

= 3 + 2 x 0.005 x 9

= 3.09 inch (ANS)

**Mathematical problem:-02.**

If the thickness of seam and stitch density is respectively 0.01 and 10 per inch. Find out thread consumption for Stitch type-301?

**Solution:**

Given that,

Thickness of Stitch (T) = 0.01

Stitch density (S) =10 per inch

Thread consumption = ?

We know, For stitch type-301

Thread consumption (C) = 2 + 2TS

= 2 + 2 x 0.01 x 10

= 2.2inch (ANS)

**Mathematical problem:-03**

Seam’s thickness 0.015 and Stitch density per inch 15, Then what amount of thread will be needed for making 1 inch of the seam for stitch type-401?

**Solution:**

Given that,

The thickness of Stitch (T) = 0.015

Stitch density (S) =15

Thread consumption =?

Thread Consumption (C) = 4 + 2 TS

= 4 + 2 x 0.015 x 15

= 4.45 inch (ANS)

Mathematical problem:-04.

For Stitch type-504, determine thread consumption for seam thickness 0.02, stitch density 15 per inch, and seam’s width 1/4ʹʹ?

**Solution:**

Given that,

Thickness of Stitch (T) = 0.02

Stitch density (S) =15

Width (W) =1/4ʹʹ

Thread consumption (C) =3 + 4 WS + 4 TS

= 3 + 4 x ¼ x 15 + 4 x 0.02 x 15

= 3 + 15 + 1.2

= 19.2 inch (ANS)

Author of this Article Amit Kumar Das Founder of Textile Maniaa Blog Pabna Textile engineering college, Pabna, Bangladesh Email: [email protected]