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tilo@3nh.com

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About Us

3nh specializes in high-precision color measurement instruments, including colorimeters, spectrophotometers, and haze meters, serving industries like textiles, plastics, and coatings. With innovative R&D and global reach, we deliver reliable solutions for color management and quality control, trusted by customers in over 80 countries.

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Products Frequently Ask Questions

 Inquiry - quotation - communication - order confirming - deposit payment - production - testing and debugging - balance payment - packing - delivery - customer receiving - after service. 

Inaccurate color rendering, mismatched results, and noncompliance with ISO 3664 or ASTM D1729 can occur when there are deviations.

L*a*b* is an L*a*b* color space. The L* is a measure of lightness (as 0 = black, 100 = white), a* indicates the green to red axis, and b* indicates the blue to yellow axis. It is also common in color measurement in terms of precision and reliability.


Colorimeters have fixed wavelength filters and LEDs; it is less precise and simpler. Monochromators are applied to spectrophotometers, which scan a spectrum of wavelengths. Giving more detailed spectral information. Spectrophotometers are more sensitive and flexible in complicated analyses.


Color evaluation will change based on how a sample is viewed.  A 45° viewing angle to the source is recommended to reduce shading and achieve consistent comparison.

A colorimeter sends light through a solution and measures the amount that is absorbed. It computes the absorbance by comparing the intensity of light before and after passing through. The greater the concentration of the color, the greater is the absorption of the light. It is also possible to quantify the color of the solution.


Testing metamerism helps to identify color matches that look the same but are different in different lighting. This helps in ensuring that materials are of the same quality in all light settings.


Our machine is packed by standard export wooden box, it won’t be damaged. We’ve delivered many testing machines abroad by sea or by air without damage.

Each haze test can take from 3 to 10 seconds depending on the device and the type of sample.


Our professional team will give you the best suggestion as long as you tell us what kind of test you need to do and the required specification.