Leather Rubbing Colorfastness Tester operating program

GB/T14576-1993 stipulates two test methods for determining the color fastness of leather to light and perspiration. It is suitable for the determination of the color fastness to light and perspiration of pure spinning and blended fabrics of cotton, linen, silk and chemical fiber. It is not applicable. To loose fiber.

 

 

Leather Rubbing Colorfastness Tester operating procedure:

 

Method A:

 

1. Pour acid and alkaline sweat into two containers respectively, and put a combined sample composed of a sample and a cotton lining fabric (size not less than 12cm×8cm) into each container. Bath ratio is 50:1, soak for 30min at room temperature to make it penetrate evenly. Take the combined sample out of the sweat and squeeze it on a small roller to make the liquid content 100±5%. During the test, acid and alkaline sweat should be carried out separately.

2. Fix the combined sample on the sample holder along the warp direction, and place it in a light and sweat test container containing 10 mL of acid sweat or alkaline sweat. At this time, it should be ensured that the lower end of the cotton lining is immersed in sweat, but the sample is not immersed in sweat.

3. Put the light-sweat test container with the sample together with the light-fastness sample and the blue standard sample (level 1 to 5) in the exposure chamber of the light-fastness tester, according to the provisions of 4.1 in GB8427 or 4.1.3 in GB 8428 Perform exposure. When the discoloration of the level 4 blue standard sample reaches the gray card level 4 to 5, the exposure can be terminated.

4. Take out all the samples and the blue standard sample, remove all the coverings, and place the light-fast sample in a dark place for 4 hours, and evaluate its light fastness according to the provisions of Article 7.1 of GB8427. The light-sweat-resistant sample was washed in warm water at 40°C for 5 minutes, and dried in the air at no more than 60°C, and then the composite color fastness to light and sweat was evaluated.

 

Method B:

 

1. Pour acid and alkaline sweat into two containers respectively. Take two samples, and put 6 layers of cotton lining under each sample. The lining size should be the same as the sample. Make two combined samples, put them in acid and alkali sweat solution, bath ratio 50:1, immerse them at room temperature for 30min to make them penetrate evenly, take out the combined sample and place it in Squeeze on a small roll to make the liquid content 100±5%. During the test, the acid and alkali sweat should be carried out separately.

2. Same as Method 2 of A, but do not use light and sweat test containers.

3. Same as A method 3.

4. Same as A method 4.

 

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