1. Procedure of the Different Tests:
1. Color Fastness to Wash Test :
Required materials:
1. Sample size 40 × 100 mm
2. Multifiber at 40 × 100 mm
3. ECE detergent (WOB) – 4g/L
4. Sodium Perborate (Na2BO3.H2O2.3H2O2-1g/L) - 1g/L
5. Distilled water
6. Normal cold water
7. Steel balls
Required instrument:
1. Rota Wash
2. Scissor
3. Stitch machine
Procedure :
1. Cut sample & multifibre at 100 × 400 mm and then stitch.
2. 50 ml ECE detergent (WOB) & 50 ml Sodium per borate is taken with the
sample.
For Marks & Spencer, the solution is taken by the following formula:
(Sample fabric + Multifibre weight) × 50 ml
3. The sample is kept in 600
C for 30 minutes in Rota Wash Machine
4. Rinse the sample twice with cold water.
5. Dry at 60°C by hanging or by Flat iron pressing but temperature should not
be more than 150°C.
Report:
Dry the specimen and the change of shade & degree of staining is measured by Grey
Scale & Staining Scale.
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2. 2. Color Fastness to Perspiration Test :
Test specimen:
• Sample fabric – 50 mm × 50 mm
• Multifibre fabric – 50 mm × 100 mm
• Cut the multifibre into two piece
• Sandwich the test specimen between two piece of multifibre
Testing Solution:
1. Alkaline Solution:
Histidine monohydro chloride monohydrate (C6H10ClN3O2.H2O)– 5.00 g/L
NaCl – 5.00 g/L
Disodium hydrogen orthophosphate (Na2HPO4.2H2O) – 2.5 g/L
PH
– 8 (Adjust by 0.1 N NaOH)
2. Acidic Solution:
Histidine monohydro chloride monohydrate (C6H10ClN3O2.H2O)– 5.00 g/L
NaCl – 5.00 g/L
Sodium di-hydrogen orthophosphate (NaH2PO4.2H2O) – 2.2 g/L
PH
– 5.5 (Adjust by 0.1 N NaOH)
Method:
- The composite specimen is put in a peri dish (2 specimen of a sample).
- Solution (Alkaline & Acidic) is taken in the two peri dish. Here, M:L is taken 1:20.
- Bubble is made out from the specimen by tapping.
- The specimen is put for 30 minutes.
- A glass plate is placed on the composite specimen for 15 minutes at room
temperature.
- Excess solution is poured off.
- Peri dish with composite specimen & glass plate is placed into the incubator at
(37±2)0
C for 4 hours.
- The specimen is dried (Temp ≤ 600
C)
Report:
- Change of shade & degree of staining is measured by the Grey Scale & Staining
Scale.
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3. 3. Color Fastness to Water Test :
Test specimen:
• Sample fabric – 50 mm × 50 mm
• Multifibre fabric – 50 mm × 100 mm
• Cut the multifibre into two piece
• Sandwich the test specimen between two piece of multifibre
Testing Solution:
• Water is taken as required
Method:
- The composite specimen is put in a peri dish (2 specimen of a sample).
- Water is taken in the peri dish as required.
- Bubble is made out from the specimen by tapping.
- The specimen is put for 30 minutes.
- A glass plate is placed on the composite specimen for 15 minutes at room
temperature.
- Excess solution is poured off.
- Peri dish with composite specimen & glass plate is placed into the incubator at
(37±2)0
C for 4 hours.
- The specimen is dried (Temp ≤ 600
C)
Report:
- Change of shade & degree of staining is measured by the Grey Scale & Staining
Scale.
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4. 5. Color the Fastness to Rubbing (Dry & Wet) Test :
Sample:
- Dyed fabric – 15 cm × 5 cm
- White Test Cloth - 5 cm × 5 cm
Procedure:
- White test cloth is put on to the grating and stag by steel wire.
- The sample is run twenty times manually for ten seconds. and the rubbing
fastness of the sample cloth and degree of staining is accessed.
- For rubbing fastness (Wet), the rubbing cloth is placed in the water and socked
and squeeze. The wet rubbing cloth is placed on to the grating and stag with
stainless steel wire and run ten times manually then assess the staining on to
the rubbing cloth and the rubbing fastness of the sample cloth is accessed.
Report:
- Change of shade of the sample is measured with grey scale and degree of
staining of the white test cloth is measured by Staining Scale.
There are also some tests are done in the lab. And the process is described below-
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5. A. Measuring the Dimensional Stability (Shrinkage & Spirality):
Sample:
• Two piece of 50 cm × 50 cm fabric is taken for test.
Procedure:
a. Conditioning: Put the sample in table for 4 hrs for conditioning before starting
test.
b. Cut the sample 50x50 cm & benchmark should be 35x35 cm. Stitch the sample
(3 sides) by over lock sewing machine.
c. Put sample in washing machine and run according to buyer’s choice.
d. Drying: All Buyers’ requirement is tumble Dry except ECHO SCOURING is flat
dry.
SHRINKAGE TEST CALCULATION:
Before wash – After wash
Shrinkage % = X 100
Before wash
Spirality test calculation:
S = (S1+S2) / 2
Spirality = (S+S × L)/100.
Suppose,
S1 = The right side distance of the specimen from the stitch line after
wash.
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6. S2 = The left side distance of the specimen from the stitch line after
wash.
L = Length before wash
B. pH of a Dyed Fabric Test:
Test specimen:
• 2 gm of dyed fabric is taken.
• The fabric is cut into pieces of (0.5 cm × 0.5 cm)
Procedure:
1. The sample is taken into conical flax.
2. 100 ml distilled water (slightly warm) is taken into the conical flax.
3. The conical flax is put on the Magnetic Stirrer for 30 minutes.
Report:
The PH
of the conical flax is measured by Digital PH
meter.
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7. S2 = The left side distance of the specimen from the stitch line after
wash.
L = Length before wash
B. pH of a Dyed Fabric Test:
Test specimen:
• 2 gm of dyed fabric is taken.
• The fabric is cut into pieces of (0.5 cm × 0.5 cm)
Procedure:
1. The sample is taken into conical flax.
2. 100 ml distilled water (slightly warm) is taken into the conical flax.
3. The conical flax is put on the Magnetic Stirrer for 30 minutes.
Report:
The PH
of the conical flax is measured by Digital PH
meter.
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