Test method and technical requirements for color fastness tester to sunlight

The color fastness tester to sunlight is used for light aging test of various textiles, leather, plastics and other materials. In the national standard system, GB/T8426-1998 'Colorfastness to Light of Textiles: Sunlight' and GB/T8427—1998 'Textile Color Fastness Test Color Fastness to Artificial Light: Xenon Arc' There are 5 methods for the selection of exposure methods. Method 1 is to control the exposure cycle by checking the samples, and each sample needs to be equipped with a set of blue wool standards; Method 2 is to check the blue wool standards to control the exposure cycle, and only one set is required for a batch of different samples Blue wool standard; Method 3 is used to check whether the sample is consistent with a certain performance specification. The sample only needs to be equipped with two blue wool standards as required, and the exposure cycle is also controlled by checking the blue wool standard; Method 4 is It is used to check whether the sample conforms to an agreed reference sample, and the exposure period is controlled by checking the reference sample without the blue wool standard; Method 5 is used to check whether the sample meets the approved radiant energy. It can be exposed to the sun alone or equipped with a blue wool standard, and the exposure time is determined according to whether the specified radiation energy is reached. In the national standard system, GB/T8429-1998 'Colorfastness of Textiles Color Fastness to Weather: Outdoor Exposure' and GB/T8430-1998 'Colorfastness of Textiles to Artificial Weather: Xenon Arc' related to the selection of exposure methods There are only 3 methods, of which method 1 and method 2 are the same as above, and method 3 and method 5 above are the same. The exposure method in GB/T843l-1998 'Testing and Evaluation of Photochromism for Color Fastness of Textiles' is specific, only the low-level blue wool standard 1 or L2 is required, which is determined according to the time required for the blue wool standard to change color. the exposure time of the sample. GB/Tl6991—1997 'Textile Color Fastness Test High Temperature Light Fastness: Xenon Arc' also has 3 exposure methods, method 1, method 3 are the same as above, method 2 is to control the exposure period by checking and specifying the minimum level standard. Technical requirements: Because the climatic conditions in my country and the United States are not exactly the same, there are certain differences in their standards. GB/T 8427—1998 'Color fastness to artificial light: Xenon arc' standard for temperature and humidity control: under normal conditions (temperate), moderate effective humidity is used, the humidity control standard sample is level 5, and the high standard blackboard temperature is 50 ℃, measured by radiometer The radiant energy per unit area (ie, the amount of radiation) is 42W/m (wavelength is 300nm~400nm). The humidity control standard is a cotton poplin fabric dyed with red insoluble azo dye by exposing the humidity control standard together with the blue wool standard fabric. When the humidity control standard changes color to gray sample card level 4, use blue The wool standard grades its colorfastness to light. The technical conditions for indoor textile exposure in the American AATCCTM16-2003 'Color Fastness to Sunlight' standard are: the air temperature in the test chamber (43±2) ℃, the relative humidity in the warehouse (30±5)%, blackboard thermometer (63±3) ℃, radiation dose (48±1) W/m2 (wavelength 300nm~400nm).

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