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Types of 3NH Grayscale Charts Products

ITE Grayscale Chart I(Gamma = 0.45)

11-Steps Gray Scale Test Chart

HDTV Gray Scale Test Chart

ITE Grayscale Chart II(Gamma = 1)

Gray Scale Test Chart(11 steps)

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FAQs About  Grayscale Charts

In industrial production and quality control, color consistency is one of the core elements determining product quality. Whether it is the metallic paint for automobile coating, the dyeing effect of textile fabrics, or the ink matching in packaging and printing, subtle color deviations may lead to cost waste or damage to brand image.

The LAB color space defines colors with a three-dimensional model:

  1. Lightness (L): It indicates the lightness or darkness of a color, ranging from 0 (pure black) to 100 (pure white).

  2. Hue and Saturation (a and b):

    • The a-axis represents the red-green tendency, with positive values leaning towards red and negative values leaning towards green;

    • The b-axis represents the yellow-blue tendency, with positive values leaning towards yellow and negative values leaning towards blue.

It is a globally recognized standard and supported by most modern color measurement equipment. Color is quantitatively analyzed by measuring Lab values with instruments.


Yes, we warmly welcome and sincerely invite you or your team to visit our factory, we will help to arrange hotel and pick up you from airport.

Common sources like D65, TL84, and CWF mimic daylight, store, home, and fluorescent lighting, and are used to provide conditions for dependable color comparison.


The photoelectric integral color‑measuring instrument is what we commonly refer to as a photoelectric colorimeter. It obtains color tristimulus values through one‑shot integral measurement, featuring fast measurement speed and low cost, yet its absolute accuracy is inferior to that of a spectrophotometer. It works well for quick color‑difference comparison. For sophisticated color analysis or color formulation, a spectrophotometer is recommended instead.

How it converts color into digital values

At its core, this type of instrument simulates human color vision. Filters work together with detectors to convert optical signals into electrical signals and then calculate numerical values.

  1. Light strikes the sample, and reflected light enters the instrument.

  2. Filters split the light into three channels: red, green and blue, corresponding to three photodetectors respectively.

  3. Detectors measure the light intensity of each channel. The instrument directly computes tristimulus values X, Y, Z as well as chromaticity coordinates.

  4. The matching performance of optical filters is critical. Better compliance with the Luther condition delivers higher measurement accuracy.

Differences from spectrophotometers

Both instruments measure color, yet they serve quite different application scenarios.

Photoelectric colorimeter: Simple structure, compact size and easy operation with fast measurement speed. It can only test color difference instead of spectrum, and its absolute accuracy is limited, with chromaticity‑coordinate error around ±0.03.

Spectrophotometer: Light is dispersed and measured wavelength‑by‑wavelength. It provides high accuracy (chromaticity‑coordinate error up to ±0.001‑±0.003) and can acquire spectral reflectance curves. However, it comes with higher cost, complicated structure and relatively slower measurement speed.

Suitable application scenarios

Photoelectric colorimeters are preferred for routine production inspection, quick comparison and cost‑sensitive projects.

  • Textile printing & dyeing: Rapid color matching and color‑difference comparison

  • Plastics, coatings and printing: Spot‑checking color consistency on production lines

  • Field‑testing scenarios: Handheld models support on‑site measurement

  • Budget‑limited projects: Photoelectric colorimeters are cost‑effective with sufficient practical functions


A colorimeter is used to measure absorbance at selected wavelengths with the help of filters, which is suitable for rapid comparison of colors. A more advanced spectrophotometer has a monochromator. It can measure a larger range of the spectrum of light and is more accurate. You can also get detailed color data at visible and non-visible wavelengths.


To answer this question, you first need to clarify your specific needs: 

  • Is it for simple color quality control (QC)?

  • To coordinate with supply chain color management?

  • To monitor on-line color stability?

  • Do you require computer color matching or production color correction?

  • What is your budget?

  • Systematic supervision and evaluation of color performance in dyed products?

If you aren’t fully clear about your requirements at the initial stage, our color management engineers are ready to communicate with you. We will recommend solutions tailored to your needs. When conditions permit, we can provide prototype demonstrations and trial testing to ensure the instrument meets your practical application requirements.

Further Grayscale Charts Applications and Solutions

Plastic Product Color Detection
Industrial Paint and Coating Color Detection
Print Color Calibration
Ink Color Detection
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