Gas Fume Chamber TF417

Test Purpose

The gas fume chamber is used to test the colorfastness of textiles exposed to atmospheric nitrogen oxides produced by chemical butane gas or municipal gas.

Testing Principle

Expose the tested fabrics to nitrogen oxides produced by gas combustion, and observe their color changes after a certain period of time. Place the textile sample and the control standard sample in the combustion smoke at the same time until the color change of the standard sample is controlled equal to the color of the fading standard, then use the gray card to evaluate the discoloration of the sample. If the sample discoloration is not observed after an experiment cycle, the specified number of test cycles can be continued.

Sample Preparation

Shear the test samples according to standard requirements, if necessary, press the sample between two layers of tightly woven cotton, or press it with steam.

For evaluating the performance of color-resistant nitrogen oxides during storage and use, use an original sample for testing.

If the color fastness to smoke is determined after dry cleaning. Soak the sample in cold perchloroethylene for 10min, extrude and dry it in the air. Keep an intact sample after dry cleaning and before testing for comparison with the tested sample.

Test Step

1 Suspend the specimen and a controlled sample freely in the smoke chamber, and they cannot be contacted or directly contacted with any hot metal surface. Ignite the gas and adjust the flame and ventilation so that the temperature of the smoke chamber does not exceed 60℃.

2 When the color change of the control sample is consistent with the standard color change under the standard light source, take out the sample and rate it against the gray card immediately.

3 Put the color changed samples and their respective samples, together with the control standard samples into the buffered urea solution for 5 minutes, fully cleaned, dry in the air temperature not exceeding 60℃. Then rate them by the gray card.

4 After a period of time, replace the untarnished sample and the untreated sample in the smoke chamber until the color change of the second controlled standard sample shows a color equivalent to the fading standard.

5 The test may repeat the specified number of cycles or until a certain degree of discoloration of the sample occurs.

How to test the gas fume colorfastness of the fabric? Through this article, I think you might have got some information. If you want to know more, please contact us. As a professional supplier of textile instruments, we are committed to continually improve the user experience, TESTEX Textile Testing Equipment is a reliable choice for testing textile quality.

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