The reason why fluorescent ultraviolet lamps are the light source of ultraviolet weather resistance testing machines is that they are more stable than other lamps and can reproduce the test results better. It is suitable for the changes of materials placed outdoors and the weather resistance test of improved formulas and products of new materials. It is suitable for the sunlight resistance of non-metallic materials and the aging test of artificial light sources. Using fluorescent UV lamps to simulate the effects of sunlight on physical properties, such as brightness reduction, cracking, and flaking, is the best method. The UV weathering tester measures the size of the sample before the test is heated and makes a mark, especially the mark after aging. It is necessary to mark that the material cannot be used in any critical surface and that the sample cannot be handled, or that the components are decomposed when heated. In order to prevent the migration of sulfur, antioxidants, peroxides or plasticizers, and avoid the simultaneous testing and heating of different types of samples in the same aging box, it is recommended that the following types of materials can be heated together for testing: 1.Vulcanized rubber containing the same type of accelerator or sulfur and accelerator at approximately the same ratio; 2. The same type of polymer; 3. Rubber containing the same type and same amount of plasticizer; 4. Rubber containing the same type of antioxidants; 5. The number of samples before and after aging is usually five, but not less than three; 6. Only samples with the same size specifications can be compared; 7. The aged samples cannot be mechanically, chemically or heat-treated. Lemon Juicer Stainless Steel Lemon Juicer,Lemon Juicer,Hand Press Lemon Juicer,Plastic Lemon Juicer,Citrus Juicer RealSheen Lifestyle Enterprise Limited , https://www.realsheen.com
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