The calculations involved in determining the average counts in the tex system are much simpler than those of the indirect systems. This is because it is a direct system and the length and weight units are in the metric system. In this article, we will discuss average **count calculation in tex system** with different examples.

To calculate the average count in the tex system, when the yarns counts are of equal length, take a suitable length unit in kilometer. Then determine separately the weight in grams of this length unit of yarn of each count by simply multiplying the length unit of the yarn by its count number. Now, the total length of the yarns and their weight is known, calculate the average count by using the formula,

Average count in tex,

……..Total weight in grams

= ………………………………………..

…..Total length in kilometers

If the lengths of the yarns of different counts are not the same, and the length of the yarn of each count is given, then calculate the weight in grams of the yarn of each count separately by multiplying the length by its corresponding weight. Then add the length of all the yarns together. Similarly, add the weight of all the yarns together. From the total length in kilometers and the total weight in grams, so obtained, calculate the formula given above.

Where the corresponding weight of yarn of each count is given, then proceed in the following manner:

Calculate separately the length of the yarn of each count in kilometers by simply dividing the given weight in grams by its count number. Then add the length of all the yarns together. Also, add the weight of all the yarns together. From the total length in kilometers and the total weight in grams, so obtained, calculate the average count by applying the formula given above.

The methods of calculations shown above would apply where the counts of the yarns are expressed in any direct system, except that the appropriate length and weight units of the direct system in question have to be used in place of kilometers and grams respectively.

**Average Count Calculation in Tex System with Different Examples**

**Example 01:**

Calculate the average count of 10 tex, 15 tex, and 20 tex yarns. The length of yarn in each case is the same.

**Solution:**

The weight of yarn = length in kilometers × Count in tex in grams.

Take the length of each count of yarn as 1 kilometer

Then,

1 kilometer of 10 tex yarn weights 1 × 10 = 10 grams ……………..(1)

1 kilometer of 15 tex yarn weights 1 × 15 = 15 grams ……………..(2)

1 kilometer of 20 tex yarn weights 1 × 20 = 20 grams ……………..(3)

So, adding (1), (2), and (3)

We have,

Total length 3 kilometers and total weight 45 grams.

Therefore,

Average count in tex,

………Total weight in grams

= ………………………………………..

…..Total length in kilometers

…..45

= ……

……3

= 15 tex.

So, the Average count is 15 tex.

**Example 02:
**A warp contains yarns of the following particulars:

4 ends of 30 tex yarn

16 ends of 40 tex yarn

Now, calculate the average count.

**Solution:**

Now, the yarns of 30 tex and 40 tex are in the proportion of 4: 16

Then,

4 kilometers of 30 tex yarn weight 4 × 30 = 120 grams ………..(1)

16 kilometers of 40 tex yarn weight 16 × 40 = 640 grams …….(2)

Now, adding (1) and (2)

We have a total length of 20 kilometers and a total weight of 760 grams.

Therefore,

Average count in tex,

……..Total weight in grams

= ………………………………………..

…..Total length in kilometers

……760

= ………….

………20

= 38 tex.

So, the Average count is 38 tex.

**Example 03:**

Calculate the average count of 240 grams of 16 tex, 625 grams of 25 tex, and 720 grams of 36 tex yarns.

**Solution:**

The length of 240 grams of 16 tex yarn,

…..240

= ………..

…….16

= 15 kilometers ………………(1)

Again,

The length of 625 grams of 25 tex yarn,

……..625

= ……………

………25

= 25 kilometers ……………(2)

And,

The length of 720 grams of 36 tex yarn,

……..720

= …………..

………36

= 20 kilometers ………………(3)

Now, adding (1), (2), and (3)

We have a total weight of 1585 grams and a total length of 60 kilometers.

Therefore,

Average count in tex,

…….Total weight in grams

= ……………………………………..

….Total length in kilometers

…….1585

= …………….

……..60

= 26.4 tex

So, the Average count is 26.4 tex.

Author of this Article:Mayedul IslamAssistant Chemist Ha-Meem Group, Tongi, Gazipur, Bangladesh Email: [email protected]