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3nh ROHS Certificate 3nh ROHS Certificate
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3nh ISO9001 Certificate 3nh ISO9001 Certificate
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Declaration of 3nh & TILO Mail Declaration of 3nh & TILO Mail
Shenzhen 3NH (ThreeNH) Technology Co., Ltd. Shenzhen TILO Technology Co., Ltd., hereby declare we only use the domain name suffix enterprises email address (xxx@3nh.com and xxx@tilo.cn) to contact you....
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3nh Products Have Got CE Certificate 3nh Products Have Got CE Certificate
CE-certification or CE Marking is a conformity marking consisting of the letters CE. The CE Marking applies to products regulated by certain European health, safety and environmental protection legislation. The CE Marking is obligatory for...
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Human Eyes to Distinguish Colors Human Eyes to Distinguish Colors
The color difference unit, NBS, is derived from the unit of color difference formula which is established by Judd-Hunter. In 1939, the American Bureau of Standards adopts this color difference formula and calculates the color difference acc...
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The Color of Objects The Color of Objects
There are three major elements to perceive color: light, object and observer. Any change of these three elements will influence the observers color perception. When the light source and the observer dont change, then the object will determi...
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