List Chemical Testing Equipments for Dyeing Lab

List 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. equipments for lab dip preparation or chemical test and equipment for physical test. In this article we will discuss on equipments for chemical test.

Equipments for Chemical test:
  • 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:

Sample dyeing machine
Sample dyeing machine
Fig: 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
Washing machine (For testing color fastness to wash)
Fig.:- digiWash Washing Machine
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
Water Heater
Fig.:- Water Heater
Function:
Used to heat water when emergency hot water is needed for washing a sample manually.

Distilled Water Maker
Fig.:- 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: Water Hardness Tester
Fig.:- Water Hardness Testing Kit
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.

Hot and Stirrer
Fig.:- Hot and Stirrer
Function:
Used for stirring the solution with the help of magnet.

Specification:
  • Brand: Misung Scientific
  • Model: MS300HS
  • Origin: Korea
Electric Balance
Fig: Electric Balance
Function:
Used to get the weight of sample and different chemicals.

Specification:

  • Brand: Precisa
  • Origin: Switzerland
Hot air Oven
Fig: Hot air Oven
Function: Used to dry the sample that has been wet treated.

Specification:
  • Brand: Paramount
  • Origin: India
  • Temperature range: RT-250˚C
Light box
Fig: Verivide 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.

PH meter
Fig: PH meter
Function: Used to determine the PH of a solution.

Specification:
  • Brand: HANNA
  • Model: HI 2211
  • Origin: Romania
Data color spectrophotometer
Fig: Data color spectro photometer
Function:
  • Color matching
  • Measuring color difference
  • Measuring the reflectance% of a dyed sample
  • Measuring the strength of dyestuff
Specification:
  • Brand: Premier Colorscan
  • Origin: India 

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