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Leather surface rubbing color fastness tester

2340.00 Dollar US$
Published date: November 9, 2021
  • Location: Chin, CHIN, Al Khor, Qatar
Test range.

  This instrument is used to test the rubbing fastness of leather surfaces and to assess the amount of color transfer from the specimen to the rubbing pad by determining the degree of "color loss" of the leather surface or coating.

  Product Details.

  This instrument is designed to perform a rubbing fastness test on leather surfaces to assess the amount of color transfer from the specimen to the pad by determining the degree of "color loss" of the leather surface or coating.

  The test can be performed in dry or wet conditions, using a dry rubbing pad or by pre-wetting the pad in distilled water or sweat solvent prior to testing. The same machine can also be used to evaluate the abrasion resistance of insole boards, for which the VESLIC-C4500 and IUP 450 are suitable.

  The tester is suitable for a variety of tests requiring "back and forth" friction on the material surface. Friction elements, number of cycles, load and temperature can be adjusted to meet the requirements of the material being tested.

  The tester is available in two models: a single-station (421) and a duplex (705) tester. The latter also allows one of the stations to be heated to perform ironing fastness tests. This test is used to determine the reaction force of the leather surface to heat and pressure (especially in the "ironed" condition), but also during normal wear. Thermoplastic substrate coatings are particularly susceptible to damage in the ironed condition. The ironing resistance of the leather can be affected by adding additives to the coating to help keep the leather surface free from ironing. A metal foot is supplied to facilitate the ironing process and the VESLIC-C4580 is suitable for this test.

  This device also tests the abrasion resistance of the upper when the sole material rubs against the upper material. The specimen can be tested using a small rubber pad instead of a felt pad. Abrasion of the upper material by the sole material can occur during daily wear, especially when the wearer stacks the legs together and the sole of one foot rubs against the upper of the other foot.

  Both models of the tester have one feature in common: the ability to load the specimen with pre-tension. This object point is particularly useful when testing elastic leathers and meets the requirements specified for the C4580 abrasion test.

  The tester is simple to operate. The specimen is placed on the tester surface and held in place with the supplied clamps. Use the knob or screw to adjust the pre-tension according to the percentage scale engraved on the test bench. The tester is equipped with a counter that automatically stops the tester when the set count is reached. A square felt pad (STM 421P) is inserted into the processing collet at the end of the friction head. The friction head is lowered into contact with the specimen and the tester is started. The material surface and the friction pad are visually inspected to observe the degree of discoloration and the wool felt friction pad is evaluated using the supplied gray scale.

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