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Color Spilled Coins (Dead Leaves) Test Chart

Color Spilled Coins (Dead Leaves) Test Chart Instructions Operating Manual Color Spilled Coins (Dead Leaves) Test Chart PDF
This Color Spilled Coins (Dead Leaves) Test Chart Instrument are Certified with
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1 Years Warranty (Additional support period of 3 years)

The Color  Spilled Coins chart (a variant of the Dead Leaves chart) for measuring texture sharpness has several advantages over older Dead Leaves charts. Key features:

  • The Scattered Coins pattern in the central region is almost perfectly scale-invariant (unlike conventional dead leaves charts), enhancing the accuracy and robustness of MTF measurements so they correlate well with other methods (such as the slanted-edge) for RAW images (which have no nonuniform or nonlinear processing).
  • Maximum contrast range is 3:1, as called for in the CPIQ Phase 3 draft Texture Blur Metric draft specification.
  • It is more uniform, i.e., is more shift-invariant than other Dead Leaves charts.
  • It contains slanted edges (2:1 and 4:1 contrast) for convenient comparisons with the dead leaves pattern.
  • The gray area to the left and right of the dead leaves pattern has the same mean density as the dead leaves pattern, allowing it to be used for effective noise PSD removal using the McElvain et. al. technique.
  • Registration marks and 16 grayscale patches are included. The linear levels used to create the grayscale patches are 0 through 255 in steps of 17 (same as the Siemens Star chart in the draft of the upcoming ISO 12233 standard).
Spilled Coins chart sizes Spilled Coins region Printed region Media size total
Large 12" × 12"
305 mm × 305 mm		 22.4" × 16.8"
569 mm × 426 mm		 24" × 18"
610 mm × 458 mm
Medium 8" × 8"
203 mm × 203 mm		 14.93" × 11.2"
379 mm × 284 mm		 16" × 12"
458 mm × 305 mm
Small 6" × 6"
152 mm × 152 mm		 11.2" × 8.4"
284 mm × 213 mm		 12" × 10"
305 mm × 254 mm
X-Small (High Precision Transmissive) 5.536" × 5.536"
141 mm × 141 mm		 9.25" × 7.75"
159 mm × 197 mm		 10" × 8"
254 mm × 203 mm

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FAQs About  Texture Test Charts

Yes, we can offer Spectrodensitometer 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.

  1. Turn on the hazemeter and check if the instrument’s display screen shows normally and if the buttons are responsive.

  2. Verify that the hazemeter’s battery power is sufficient. Replace the battery or connect an external power supply if necessary.

  3.  Confirm that the instrument’s measurement mode is set correctly. Select the appropriate measurement unit and range based on actual needs.

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.


Opaque liquids and powders can be put into a cuvette for color measurement. 

When detecting color differences, the first factors to consider when selecting a light source include its stability, directionality, lifespan, and the effectiveness of the ultimately obtained spectral curve. The illuminant of a colorimeter is a fixed bulb, such as a tungsten lamp，LED light or a long-life xenon lamp. However, for the same color sample, the results displayed by the instrument vary under different light sources. This is because different light sources cause different absorption and reflection of light on the sample, leading to differences in how both the human eye and the instrument perceive the color. 

In general, the D65 light source is used in the application of coil steel inks for construction. The D65 light source is equivalent to average daylight. Most coil steel inks for construction are used outdoors, and sunlight is regarded as the standard light source in outdoor environments. For household appliance coil steel inks, due to their usage characteristics, they are mostly used indoors. Therefore, the A standard light source is adopted for color measurement of samples based on indoor lighting conditions. The A light source is a carefully specified tungsten light source. Other light sources, such as fluorescent light sources, can be used in many types of applications. For example, some textile factories use fluorescent light sources. Therefore, a reasonable light source should be selected as the mutually recognized measurement method based on actual usage conditions and user requirements. Once agreed upon by both parties, color measurement must be conducted under the same conditions. This helps reduce unnecessary systematic errors and human errors, achieving the optimal consistency in color measurement. 

The 3nh high-precision spectrophotometric colorimeter adopts a combined LED light source with long lifespan and low power consumption, which includes UV (ultraviolet) and UV-excluded options. This design can meet the color difference detection needs of different users and supports the selection of multiple light source modes.

Haze captures the scattering of light, transmittance measures the light that passes through a said material.


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