The third-party test report is a sign of our product quality, which has a decisive impact on whether the product can successfully enter supermarkets and e-commerce platforms. As a kind of regenerated cellulose fiber, the quality of viscose fiber directly affects the performance and service life of textiles. For this reason, it is essential to systematically inspect viscose fibers, especially for colour fastness, which is directly related to the appearance and durability of the final product. First of all, we need to understand which institutions can provide viscose fiber testing services, and secondly, the specific methods and importance of color fastness testing.
Institutions that can provide viscose fiber testing include national and local quality testing centers, professional textile testing laboratories, and some third-party testing companies. These institutions are usually equipped with professional testing equipment and technicians, and are able to carry out a series of fiber quality tests according to national or international standards. When choosing a testing institution, you should pay attention to whether it has the corresponding qualification certification, such as ISO IEC 17025 laboratory management system certification, and whether it can provide comprehensive testing services, including the physical properties, chemical properties, color fastness and other aspects of the fiber.
Colour fastness testing is an important indicator of a textile's ability to retain color under various conditions, and it is also indispensable for viscose fibers. Colour fastness testing usually includes wash colour fastness, rubbing colour fastness, sun fastness and other aspects. The color fastness test is to assess whether the color of a textile will fade or transfer during washing, while the color fastness to rubbing test simulates the color retention ability of a textile under wet and dry rubbing conditions. The color fastness to sunlight test is used to check the color stability of textiles under sunlight. These tests simulate the conditions of real-world use,** the discoloration or fading that may occur in the product during daily use.
When performing color fastness testing, it is necessary to prepare standard samples according to the corresponding standards and use professional testing equipment for testing. For example, a wash color fastness test involves washing a sample with a standard white cloth at a specific temperature and detergent, then drying, and finally evaluating the color fastness grade by a color difference meter or visual grade. The rubbing fastness test requires the use of a rubbing fastness tester to evaluate the amount of pigment transferred to the rubbing cloth after a fixed number of rubbings. As for the color fastness to sunlight test, a solar weathering tester is usually used to simulate sunlight exposure and compare the color changes of the samples after a certain period of time.
In addition to the basic colour fastness tests mentioned above, there are also special colour fastness tests, such as perspiration colour fastness, water spot colour fastness, etc., which more specifically simulate the specific conditions that textiles may encounter during use. Through these exhaustive tests, the color stability and durability of viscose products in real-world use can be fully evaluated.
The testing of viscose fibers can be carried out by national and local quality testing centers, professional textile testing laboratories or third-party testing companies. When choosing a testing facility, it is important to ensure that they have the necessary qualifications and comprehensive testing capabilities. The test of color fastness is one of the important indicators to evaluate the quality of viscose fiber, which simulates different use conditions through a series of standardized test methods, so as to ensure the color stability and durability of viscose fiber products in actual use.