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11-Steps Gray Scale Test Chart

11-Steps Gray Scale Test Chart Instructions Operating Manual 11-Steps Gray Scale Test Chart PDF
This 11-Steps Gray Scale Test Chart Instrument are Certified with
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The YE0165 is designed for evaluation the halftone reproduction of 16:9 electronic cameras. Two 11-graduated counter current gray scales are arranged on a gray background (D ≈ 0.56), the gray scale corresponds to the ITU recommendation BT.709.

The output signal of an optimally gamma-corrected camera according to BT.709 generates two counter current, linear step signals.

The contrast range of the gray scale is 40 : 1.

The values of the 11-graduated gray scale are as follows:

Step Density Remission in % Video signal for BT.709 in % Video signal for gamma 0.45 in %
1 0.05 89 100 100
2 0.13 74 91 92
3 0.22 60 82 84
4 0.32 48 73 75
5 0.43 37 64 67
6 0.56 28 55 59
7 0.70 20 46 51
8 0.88 13 37 43
9 1.08 8 28 35
10 1.34 5 19 26
11 1.64* 2 11 19

*The production process for reflective charts allow a maximum printed density of 1.64. The target value for the darkest step is 1.70. Therefore the distance of the last step differ slightly.

Two black fields and a white field are located between the gray scales. The density of the black fields in the middle is D > 3 (remission < 0.1 %), the white field between has a density of 0.05 (remission 89.9%).
Recommended usage:

Adjust the aperture until the lightest patch reaches 100% video signal at the waveform monitor. With an optimally corrected camera according to ITU recommendation BT.709 the darkest patch will reach 10% signal level.

When using this chart with a gamma correction of 0.45 the video signal level for each step will change as listed in the table above.

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FAQs About  Grayscale Charts

To determine haze, haze meters are used in multiple industries such as plastic, glass, film, coating, and displays. This ensures that all optical quality of the product is in the appropriate specification, including aesthetic compliance and meeting the intercontinental quality standards.


An 18% gray background reduces distractions and color bias, helping in a more accurate assessment.


A CAC is a professional light booth designed to provide standardized lighting conditions for visual color assessment. It includes multiple light sources like D65, TL84, and UV.


For pharmaceutical tablet color accuracy & compliance (USP/EP/ICH/FDA), these 3nh spectrophotometers deliver superior precision:

1. TS8560 Benchtop (Lab/R&D – Highest Precision)

  • d/8° integrating sphere, SCI/SCE dual mode

  • ΔE*ab ≤ 0.01 (repeatability), IIA ≤ 0.1

  • Small apertures (Φ3mm/Φ8mm) ideal for tablets

  • Auto positioning, temp/humidity compensation

  • 21 CFR Part 11 software for audit trails

  • Best for: R&D, formulation, strict QC, coated tablets3nh TS8560 

2. TS8503 Benchtop (Mid-High Accuracy)

  • d/8°, dual CMOS sensor

  • ΔE*ab ≤ 0.018, IIA ≤ 0.24

  • Multi-aperture, camera view locating

  • Stable for batch-to-batch tablet consistency

3. ST70 Portable (Production/Field)

  • d/8° (SCI/SCE), ΔE*ab ≤ 0.02

  • Handheld, fast, non-destructive

  • Best for: line checks, incoming materials, small labs

4. NS800 (Cost-Effective QC)

  • 45/0 geometry, ΔE*ab ≤ 0.04

  • Rugged, touchscreen, easy QC

  • Suitable for uniform, uncoated tablets

Short Recommendation

  • Top lab accuracy: TS8560

  • Best value benchtop: TS8503

  • Portable production: ST70

  • Economical QC: NS800

All meet pharmaceutical standards for tablet color uniformity, coating consistency, and stability testing.


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

Threenh Technology is a Chinese professional Measurement Instrument 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.


Colorimeters are more affordable, portable, and easier to use, making them a suitable choice for basic color measurement applications, spectrophotometers are better for research, development, and when dealing with complex or highly precise requirements. The biggest difference is in capability and usage. Spectrophotometers are incredibly powerful and can offer more in-depth color measurements than a colorimeter, such as spectral data.

Colorimeters are primarily used for color quality control, while spectrophotometers are used for analysis and formulation.


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