FABRIC TEST

List of Basic Tests of Textile Fabric

Today I’m writing about list of basic tests of textile fabric, although these tests are different depending on buyers’ requirements & it needs a vast discussion. But I’ll discuss on very basic things shortly for only garments probationers. Please keep in mind what I wanted to say in my previous writings, there are so many ways here to perform a job, through day by day practices, you’ll find the easiest way for you to do your job well.

A. Tests for General Fabric Information:

Following textile basic tests are used to gain general fabric information. See the list of basic tests of textile fabric below for what we need know for General Fabric Testing.

1. Fiber Content Test:?The test is required to know the content or ingredient of provided fabric. Following info is required during this test method.

• Single Fiber (A fiber contains one ingredient only)
• Blended Fiber (A fiber consists of more than one ingredient)

2. Fabric Weight Test:?It’s required to figure out the weight of fabric. We use different weight method for different fabrics. See below for your reference:

• GSM (We usually count GSM for knitted fabrics; it means Grams per Square Meter).
• Oz (We usually use it for woven fabrics; it means Ounce per Square Yards).

Fig: GSM cutter

Fig: GSM checking machine

3.?Yarn Count?(Used to determine the fineness of yarn, to express weather the yarn is thick or thin)

4. Threads per unit length?(Used to identify the knitting way)

5. Defects?(Mostly used 4-point system to identify visual defects of fabric, it’s called?fabric inspection).

For?4 point system, fabrics are taken as per below table for inspection by factories’ QCs (Quality Controllers). It shows the percentage of fabric, a QC should take the amount for his fabric inspection as per fabric packing list.

Yards received as per packing list Percentage

1 – 2500 20%

2501 – 5000 10%

5001 – 20,000 8%

20,001 – 30,000 6 %

30,001 – 50,000 4%

Penalty points are given as per following table. During Fabric Inspection, A QC needs keep in mind that a hole on fabric usually gets 4 point. Maximum 4 points can be charged for 1 linear yard. Acceptance is 40 points per 100 yards. Sometimes it depends on buyer’s requirement.

Formula:?Total defects points / Fabric length in yards X 36 / Fabric Width X 100

Inches Points

From 1 to 3 inches 1

Above 3 to 6 inches 2

Above 6 to 9 inches 3

Above 9 to 36 inches 4

Fig: Fabric inspection machine

B. Dimensional Stability (DS):

Supposed, you bought a shirt from a shop as per your required size. But after washing, it became smaller or larger than your required size. Then you’ll be upset. So, to avoid this problem, fabric requires Dimensional Stability Test. Please note, below topics belongs to dimensional Stability Test.

1. DS to Washing (shrinkage) (needs for checking measurements of garment after washing)
2. DS to Dry Cleaning (needs to check measurements of garment after dry cleaning)
3. Spirality / Skew / Torque (requires to check twisted deformation of garments after dry cleaning & washing)
4. Garments Appearance after Washing / Dry Cleaning (requires to check shape of garments after wash)

Fabric Shrinkage Test Formulas are as follows:

Shrinkage % = Before Wash – After Wash / Before Wash x 100

Twisting % = After Wash Twist Measurement / Total Length x 100

Photo of Garment Shrinkage after Wash

Fig: Textile washing machine

C. Color Fastness (CF):

Color Fastness Test is undertaken to measure the level of fading or bleeding that occurs on garments with factors like washing, ironing, lights, rubbing etc. Below are the main ones that are standardized. The light fastness of textile dye is categorized from one to eight and the wash fastness from one to five. Please note, the higher the number the better fastness is obtained.

1. Color Fastness to Washing?(used to measure color bleeding or fading after wash)
2. Color Fastness to Dry Cleaning (used to measure color bleeding or fading after dry cleaning)
3. Color Fastness to Ironing (used to measure color bleeding or fading after ironing)
4. Color Fastness to Water (used to measure color bleeding or fading into water)
5. Color Fastness to Rubbing (used to measure color bleeding or fading after rubbing)
6. Color Fastness to Perspiration (used to measure color bleeding or fading into perspiration)
7. Color Fastness to Light (used to measure color bleeding or fading into light)
8. Color Fastness to Chlorine Bleach (used to measure color bleeding or fading while chlorine bleaching)

Fig: Color Fastness Before & After Wash

D. Physical Characteristics:

It’s a qualitative or quantitative procedure that consists of determination of one or more characteristics of a fabric, process or service according to a specified procedure. It’s obviously a major part of fabric experiment. Following topics are done during Fabric’s Physical Characteristics Test:

1. Tensile strength?(used to realize the tensility of fabric)
2. Tearing strength (used to realize the tearing strength of fabric)
3. Bursting Strength (used to realize the bursting strength of fabric)
4. Pilling resistance (used to realize the?pilling resistance of fabric)
5. Abrasion resistance (used to realize the abrasion resistance of fabric)
6. Seam Slippage (In this case, 75 mm wide fabric specimens are held in screw grips and the force is measured when the seam separates by a defined distance. The force-travel diagrams of a seamed and a seamless reference test specimen of the same material are then compared).
7. Recovery Test (It refers the power of fabric to come its original form or shape after stretched)
8. Water Repellency (To observe the level of water repellency of water proof finished goods)
9. pH Value (pH is a measure of the acidity or basically of an aqueous solution. The pH scale measures how acidic or basic a substance is. The pH scale ranges from 0 to 14. A pH of 7 is neutral. The pH less than 7 is acidic. The pH greater than 7 is basic).
10. Pile Loss (This test method covers the determination of the abrasion of pile fabrics when the loss of pile stuffs occurs, sometimes called pile retention or pile pull out).

Fig: Pile fabrics

In some cases, more basic tests of textile fabric are required depending on buyers’ requirements such as flammability, fill power, harmful chemicals & heavy metal content etc. Today I’m going to finish here. Hope, we’ll meet soon with more. Before leaving, please pardon me for finding anything boring in my writings. Thank you for reading with patience.

SHAKAWAT HOSSAIN JONEY

COUNTRY MANAGER

01842111095(Whatsap,We chat)