The standard “JIS B 7751 Light exposure and light-water exposure apparatus (closed carbon arc type)” developed by the Japanese Industrial Standards Organization (JIS) describes light exposure and light and water exposure devices to be used in light resistance and weather resistance tests of various industrial materials and products. This standard applies to ultraviolet carbon arc lamp type light resistance testers and weather resistance testers.
Light resistance is the property of a substance to withstand physical and chemical changes that occur when exposed to light. Weather resistance is the property of a substance to withstand physical and chemical changes caused not only by light but also by heat, temperature, humidity, wind and rain, and similar influences.
The light emitted from the light-emitting part of this test equipment contains a large amount of ultraviolet rays, so if it is necessary to observe the inside of the test equipment tank during test work, it is necessary to take adequate safety measures, such as wearing goggles made of UV-blocking glass.
The light resistance tester is a tester that can irradiate an artificial light source similar to sunlight to quickly examine some properties of light resistance. In addition, the weather resistance tester is a tester that investigates some properties of weather resistance in a short time by intermittently spraying water by irradiating an artificial light source similar to sunlight.
JIS B 7751 is an industry standard covering closed carbon arc type light and light-water exposure devices. These devices are used to test the light resistance and weather resistance of various industrial materials and products.
This standard is important in the following respects:
Briefly, this standard specifies in detail the technical specifications, design and performance criteria for closed carbon arc type light and light-water exposure devices. These devices are used to evaluate the light and weather resistance of plastics, paints, coatings, textiles and other industrial materials. The standard includes detailed information on how to perform the tests, light and water exposure times, and environmental conditions such as temperature and humidity.
Closed carbon arc type light and light-water exposure devices are special testing machines used to test the resistance of various materials, such as plastics, paints, textiles, coatings and similar materials to sunlight and environmental conditions. These devices produce high intensity ultraviolet (UV) and visible light by an electric arc between carbon electrodes. This light has a spectrum similar to natural sunlight and is used to simulate the behavior of materials in sunlight. Being closed type means that the test is carried out in a controlled environment (indoors).
This test method is a method that is carried out not only with light but also with water spray or humidity. This measures the resistance of the material to environmental effects such as photo-aging and hydrolysis.
The objectives of this method can be listed as follows:
Our organization, which has been trying to support businesses from every sector with its testing, measurement, analysis and evaluation studies carried out in a wide range for years, has a strong staff that closely follows the developments in the world in the field of science and technology and constantly improves itself. In this context, testing services in accordance with the "JIS B 7751 Light exposure and light-water exposure apparatus (closed carbon arc type)" standard are also provided to businesses.
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