Understanding the Circular Rubbing Colour Fastness Tester: Principle,Features,Operation-gester-instruments.com

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Understanding the Circular Rubbing Colour Fastness Tester: Principle, Features, Operation June 27 , 2025

Understanding the Circular Rubbing Colour Fastness Tester:

Principle, Features, Operation

This Circular Rubbing Colour Fastness Testere is used for assess colored materials friction damage and surface color transfer. It is suitable test the upper materials, such as leather, plastics and fabric etc.

Circular Rubbing Colour Fastness Tester

Principle
Under constant pressure condition, rubbing can be carried out in dry or wet circle wool felt, the machine will stop when the preset rub count has bees reached. Fastness can be judged by the effect on the sample material or the transfer of color to the rubbing pad and assessed by reference to a standard gray scale.

Features

Test methods: dry rubbing, wet rubbing, perspiration rubbing, alcohol rubbing, organic liquids rubbing. (The probational liquid need to be prepared by customers)
The counter can pre-determined test counts and show actual test count. The machine will stop when the preset count has been reached.
Memory function: when preset count has not been reached, if to stop test by manual, the current number of test will be saved until to clear it to zero or continue testing; if to shutdown and restart the machine, the current data will be clear to zero, the preset count would be the value of last set.
According to different requirements of testing, can be applied to correspondent load.

How to Conduct the Circular Rubbing Colour Fastness Tester

Acceptance:
Inspection accessories (according to order): Square iron block (dry rubbing test after organic solvent is moistened from the back), round aluminum block (help to cool sample during dry rub test), weight.

Prepartion:
Adjust the level of the machine according to the level.
Confirm the power supply and connect it. Turn on the power switch and emergency stop switch.
Click "English" to enter the test interface.
Click "Micro" to check if the machine is working properly.
Make sure the friction head is lifting and lowering normally without any jamming.

Dry rub test operation:
Install the wool felt: Lift the fixture and install the wool felt on it.
Place the specimen test side up and lower the fixture.
Install the weights.

Parameter settings:
Test times setting: Click "English", click "SETTING" to enter the parameter interface,
there are "Counter" and "Timer" modes, select "Counter" mode, click to set the number of times 64.
Speed set: 150 ± 5r/min.
Click "TEST" to return to the test interface, click "Zero" to clear, click "TEST" to start test.

For specimens with low melting or softening temperature coatings on the surface during testing, the machine should be stopped periodically to avoid heat damage.
A round aluminum block was placed over the area where the specimen was rubbed, and the specimen was placed on the circular aluminum block and allowed to sit for 30 seconds to help remove the heat before the test was continued.

When the testing cycles is reached, it will stop automatically. Lift up the fixture, remove the specimen and observe.