Color fastness

  • Color fastness

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Scorch Tester/Sublimation fastness tester

Scorch Tester/Sublimation fastness tester

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In the daily process of shaping and high temperature ironing,  dyes heat stability  will  affect the appearance  of fabrics..  Dyes heating , heat transfer properties will cause the change of fabric color. 
Sublimation fastness tester (large)  is used to determine the hot pressing ironing and  dry heat (sublimation)  color fastness properties for all kinds of  dyed  printing  material and fabrics, it also can be used for determination the resistance to chlorine damage, textile bleaching products, scorch yellowing test, disperse dye sublimation fastness test, dye fastness test, high temperature dimensional stability. It is commonly used in printing and dyeing fabrics, textile auxiliaries  clothing industry.
 
Standard
GB/T 5718,GB/T 6152,JIS L0879,JIS L0850,ISO 105 P01,ISO 105 X11,AATCC 117,AATCC 133, AATCC 92(G247),AATCC 114(G247),M&S C13(G247B),M&S C10(G247B)

Features
★ Single work station easy for operation, high cost performance,  Multi work station type can raise the efficiency and also meet M&S standard.
★ Upper and lower heat board control temperature separately ,  accurate temperature control, timing alert, control testing time  exactly.  
★  Heating board distance is adjustable, suitable for specimen of different thickness,   High efficient insulation material  ensures the safety operation.   

Technical Parameters
Model                              G247 G247B
Heating board area 100mm╳40mm 210mm×210mm
Heating board material Aluminum plate Aluminum plate
Heating time Custom Custom
Pressure 4kPa±1 kPa 4kPa±1 kPa(Full area)
Temperature control Upper and lower heating
independently
Upper and lower heating
independently
Temperature heating range Room temp.-300℃ Room temp.-300℃
Temperature control stability ±1℃ ±1℃
Temperature uniformity ±1℃ ±1℃
Timer Preset, Auto timing when upper board press down. Preset, Auto timing when upper board press down.
Alarm Buzz  Buzz
Test Application Hot press, dry heat,  chlorine damage Hot press, dry heat, dimension stability
Power 220V,50Hz 220V,50Hz
Size W250mm×D300mm×H230mm W345mm×D520mm×H320mm
Weight 9kg 12kg

GB/T 6152-1997 Tests for colour fastness–Colour fastness to hot pressing ( Sublimation Test Standard)
 
1、Sublimation fastness definition:
Sublimation fastness is to determine the color of various types of clothing materials, the ability of high temperature resistance and the color retardant of the clothing material under heat pressure or heat drum process.
 
2、Methodology:
①、Dry pressing: The dry specimen is subjected to a certain time in the pressure device with the specified temperature and the specified pressure. The Gray sample card is used to evaluate the color of the specimen after testing.
②、Tidal pressing: With a wet cotton-lined fabric covered, The dry specimen is subjected to a certain time in the pressure device with the specified temperature and the specified pressure. After the test, the gray sample card was used to evaluate the discoloration of the specimen and the stained color of the lining fabric.
③、Wet pressing: With a wet cotton-lined fabric covered, The wet specimen is subjected to a certain time in the pressure device with the specified temperature and the specified pressure. After the test, the gray sample card was used to evaluate the discoloration of the specimen and the stained color of the lining fabric.
 
3、Sublimation fastness testing procedure
Sample preparation:
The sample size is 40mm×100mm. The size of the accompanying fabric is the same as the sample. The specimen should be put in the standard atmosphere, which is humidity (65±2)% and temperature (20±2)℃.
 
4、Test procedure
Turn on the power.
Switch the button to ironing or sublimation. The lamp of ironing or the lamp of sublimation flashes which mean the heater starts heating.
Set the test temperature.The pressure of the temperature depends on the type of the fiber, the material of clothing or the structure of the clothing. For instance, the recommended temperature of the blended fiber should be compatible with the least heat resistant fiber
Set time in accordance to the test requirement. Commonly, the specimen would be put under the pressure and specified temperature for 15s.
When the temperature reaches the test requirements, open the heating box and put into the sample. If it is dry pressing, the specimen, which does not need to be accompanied with the lining fabric, can be heated directly. If it is moisture pressing, the specimen and the lining fabric are soaked. Wheter the lower plate of the heating device is heated or not, it should always be covered with asbestos sheets, wool flannel and dry, dyed cotton.
Put down the heating plate, and make the sample under the pressure of 4kPa, and press the Start button immediately, when the timer began to slack. After 15s, lift the heating plate.
Take out the specimen and immediately use the corresponding Grey sample card to evaluate the color change of the specimen.
 
5、Results
To evaluate the discoloration of the specimen by gray sample card 250, and then put the specimen in the standard atmosphere. After 4h, make the evaluation again.
To evaluate the staining of the lining fabric by gray sample card 251. To use the heavier staining side of the cotton-lined fabrics to evaluate.

 

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