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Types of 3NH Grayscale Charts Products

FAQs About Grayscale Charts

Yes, we can offer quality certification issued by our lab free of charge, or issued by third-party international inspection Organizations with extra charge, please contact us for confirmation.

Yes, we offer free samples for test, you are welcome to order samples to experience our excellent quality and service.

a. Users must specify Standard File Name, Sample File Name and Sample Database File Name when first use.

b.Standard File is use to store standard measurement data. Sample File is used to store sample measurement data. Sample Database File is used to store the measured data exported from sample records.

Who are we? Threnh Technology: 22-Year Professional Color Measurement Solution Provider

Threnh Technology is a Chinese professional manufacturer with 22 years of industry experience, specializing in the field of color measurement and surface gloss detection. Integrating research and development, design, production, marketing, and sales, the company takes technological innovation as its core and is committed to providing global customers with high-precision and intelligent testing instruments as well as professional solutions.


The repeatability is an important parameter for the accuracy of the colorimeter. Threenh Technology portable colorimeter for color measurements tandard deviation ΔE*ab is within 0.03 (Measurement condition: the average value of 30 measurements on the white board at an interval of 3s after calibration). Each colorimeter can pass the qualified inspection before leaving the factory to ensure it conforms to the standard of China Metrology Institute.

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