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What is color fastness to light ISO method?
2023/08/14
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ISO Lightfastness Methods are a set of standards developed by the International Organization for Standardization (ISO) to assess the ability of textiles and other materials to retain color when exposed to sunlight or artificial light. These standards are designed to measure whether a material will fade or change color when exposed to light for an extended period of time. Lightfastness testing is critical to understanding the durability and quality of materials, especially in exterior use and the textile industry.
The main purpose of the ISO light fastness test is to evaluate the color retention ability of the material, and it is divided into different grades according to the degree of fading. The test involves exposing a sample to certain lighting conditions and then comparing the color difference before and after exposure. This color difference is usually detected and evaluated using a colorimeter or the naked eye.
ISO has developed a series of standards for testing color fastness to light, such as:
- ISO 105-B02: For evaluating the color fastness of textiles to artificial light.
- ISO 105-B04: For evaluating the color fastness of textiles to natural sunlight.
- ISO 105-B06: For assessing the colorfastness of textiles to artificial light, with particular attention to sun protection.
- ISO 105-B10: For evaluating the color fastness of dyed leather.
These standards describe the test methods under different lighting conditions and how to assign different color fastness grades according to the test results.
In summary, the ISO methods for colorfastness to light are a set of standards for evaluating the color stability of materials under light conditions, and for materials used in textiles and other uses, they are an important tool for ensuring product quality and durability.
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