List of Chemical Testing Equipments for Dyeing Lab

Mustaque Ahammed Mamun
Department of Textile Engineering
Dhaka University of Engineering & Technology (DUET)
Cell: +8801723300703
Email: mamuntex09@gmail.com

Introduction:
Lab is the heart of the textile industry. Higher precision lab can aid easily to achieve the goal of the organization. Before bulk production a sample for the approval from industry is sent to the buyer as per the requirement of the buyer the shade is prepared in a lab considering the economical aspects. For doing all test different equipments are used in lab. All the equipments used in lab can be categorized into two i.e. equipment’s for lab dip preparation or chemical test and equipment for physical test. In this article we will discuss on equipments of dyeing lab for chemical testing.

List of Equipments of Dyeing Lab for Chemical Testing:

Sample dyeing machine
Washing machine
Water heater
Distilled water maker
Water hardness tester
Hot and stirrer
Electric balance
PH meter
Oven
Light box
Data color-spectrascan

Description of different laboratory equipments for chemical test:

1. Sample dyeing machine

Function: Used for dyeing the lab samples.

Machine specification:

Brand: Mathis LABOMAT
Origin: Switzerland

Technical information:

Capacity: 24 pots
Dyeing pot capacity: 200 ml
Heating system: Infrared heating system
Cooling system: Cooling is done by using water
Temperature: For polyester: 130˚C, For hot brand reactive dye: 80˚C-95˚C
M: L: 1:6

2. Washing machine (For testing color fastness to wash)

Function: Used for washing to determine wash fastness of dyed fabric.

Machine specification:

Brand: Paramount
Origin: India
Technical information:
Capacity: 8 pots
Pot capacity: 500 ml

Chemicals used for color fastness testing:

ECE detergent: 4 g/l
Sodium perborate: 1 g/l
Sample size: 10Cm×4Cm
Multi-fiber fabric size: 5Cm×5Cm
Test method: ISO 105-C06:1997/

Testing procedure:

At first multi-fiber fabric measuring 5cm×5cm is sewn with the dyed sample measuring 10Cm×4Cm.
Then the sample is placed into the test vessel that contains washing chemical.
Then the vessel is placed into the machine and the machine is run for certain time under standard temperature.
After the wash treatment, the treated sample is compared with the original untreated sample and any loss in color is graded with reference to the grey scale. This is done for assessing the change in color of the sample.
The treated multi-fiber fabric is compared with untreated multi-fiber fabric with the help of color staining grey scale to assess color staining.

Content of multi-fiber fabric:

Acetate
Cotton
Nylon
Polyester
Acrylic
Wool

3. Water Heater

Function: Used to heat water when emergency hot water is needed for washing a sample manually.

4. Distilled Water Maker

Function: Used to produce distilled water (0.5-1-liter distilled water is got from 2-2.5-liter normal water).

Application of distilled water:

Fabric PH check
Saliva test
Perspiration test
Rubbing fastness test

5. Water Hardness Tester

Function: Used to test the hardness of water.

Specification:

Brand: HANNA
Origin: Romania

Testing procedure:

5 ml water is taken in pot.
5 drops buffer solution and 1 drop indicator is added.
Titration is done with EDTA.

Test result: Test result is obtained by multiplying 300 with the reading of EDTA and the result is found in PPM.

6. Hot and Stirrer

Function: Used for stirring the solution with the help of magnet.

Specification:

Brand: Misung Scientific
Model: MS300HS
Origin: Korea

7. Electric Balance

Function: Used to get the weight of sample and different chemicals.

Specification:

Brand: Precisa
Origin: Switzerland

8. Hot air Oven

Function: Used to dry the sample that has been wet treated.

Specification:

Brand: Paramount
Origin: India
Temperature range: RT-250˚C

9. Light box

Function: Checking color difference under different light source like D65, TL84, F, UV etc.

Specification:

Brand: Verivide
Model: HD 76AL
Origin: China

Light source available:

TL 84
D 65
F
UV

Metametric: This is a property of color for which its tone shows variation in different light source.

10. pH meter

Function: Used to determine the pH of a solution.

Specification:

Brand: HANNA
Model: HI 2211
Origin: Romania

11. Data color (spectrophotometer)

spectrophotometer important testing equipments for dyeing lab — Fig: Data color (spectrophotometer)

Function:

Color matching
Measuring color difference
Measuring the reflectance % of a dyed sample
Measuring the strength of dyestuff

Specification:

Brand: Premier Color scan
Origin: India

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Mazharul Islam Kiron

Founder & Editor of Textile Learner. He is a Textile Consultant, Blogger & Entrepreneur. He is working as a textile consultant in several local and international companies. He is also a contributor of Wikipedia.