Shenzhen United Testing Technology Co., Ltd

Optical performance is a big index, it is composed of solar energy transmittance ,   solar reflectance, solar absorption rate, visible light transmission rate, visible light reflectance, total solar barrier rate, ultraviolet barrier rate, shielding coefficient, U-value and other small indicators. Light on paper, plastic, glass, metal and other materials show a normal reflection, but the amount of reflection is different. primary coverage: 1. refractive index 2 .   Dispersion and dispersion coefficient 3. Birefringence and very-optical refractive index 4 .   reflection and reflection coefficient 5. Full reflection 6. Absorption coefficient 7. Scattering General test: 1. Self-focus of light: A parallel intense beam enters the medium (similar to that through a convex lens). 2. Self-induction and transparency of light: After a short pulse of strong light enters the medium, the medium hardly absorbs its energy (almost transparent). 3. Optical bistability: After the strong ligh...

  Salt spray test is a commonly used environmental simulation accelerated corrosion test method, which is mainly used to evaluate the corrosion resistance of metal materials and their coatings, coatings, paints and other surface treatment processes. This test accelerates the corrosion process on the material surface by simulating the corrosion conditions in the Marine environment or industrial atmosphere, in order to assess the corrosion resistance of the material in a short period of time. Main test items: salt spray test (neutral, acetic acid, copper accelerated acetic acid), cyclic corrosion test, condensate water, water mist, etc.

  1. The EU RoHS Directive 2015 / 863 / EU is the core regulation of the RoHS certification, which sets limits for 10 harmful substances. 2. IEC 62321:2008, the Determination of Hazardous Substances in Electrical and Electronic Products, is an important technical reference standard for RoHS testing, and specifies the sampling and testing methods of different harmful substances. 3. EN 50581:2012, The Compliance Assessment of Hazardous Substances Limit in Electrical and Electronic Products, is an important basis document to judge whether the product meets the RoHS directive. 4. IPC-1752A: The standard specifies the labeling requirements of the RoHS certified products, including the location and size of the RoHS marks on the product and the labeling content of the components. www.uni-lab.hk/