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SFRplus Chart: Inkjet on Paper - 10:1 & 2:1 Contrast Ratio

SFRplus Chart: Inkjet on Paper - 10:1 & 2:1 Contrast Ratio Instructions Operating Manual SFRplus Chart: Inkjet on Paper - 10:1 & 2:1 Contrast Ratio PDF
This SFRplus Chart: Inkjet on Paper - 10:1 & 2:1 Contrast Ratio Instrument are Certified with
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1 Years Warranty (Additional support period of 3 years)

Contrast Ratio Options

  • 10:1 and 2:1 contrast ratios  Use of both contrast levels improves ability to analyze non-linear signal processing, which may not affect the lower contrast 2:1 contrast ratio regions 
  • 10:1 contrast only improves the completeness of 3D maps of performance across the imaging surface.
  • 4:1 contrast ratio matches the upcoming new ISO-12233 specs.  Click here for our 4:1 contrast ratio SFRplus test charts

Paper Type - Semi-gloss or Matte Options

  • Matte paper can be easier to light because it has less specular reflection than the semi-gloss paper.  The MTF is slightly less than semi-gloss paper and does not have as deep dark tones on the stepchart.
  • Semi-gloss paper has slightly higher detail than matte, has deeper black tones on the stepchart, and is recommended for most applications except for wide-angle lenses.

Square Grid Dimension Options

  • 5x9 grid dimension is recommended for for typical DSLR formats with aspect ratios of 3:2 and typical HDTV formats with aspect ratios of 16:9.
  • 5x7 grid dimension  is recommended for typical compact camera formats with aspect ratios of 4:3.

Ink Jet Chart Resolution

This chart, and all our ink jet printed charts have an approximate MTF50 of 5 cycles/mm.  Please keep this in mind when choosing the size of chart.  Using a chart that is too small with a high-resolution sensor can result in the MTF of the chart degrading the measured MTF of the camera system. In addition, it is important to use a chart that is large enough to accomodate the minimum focus distance, as well as the resultion of your sensor. 

Paper Size and Active Area Options

Charts are available in tfive main sizes with variations depending on the grid dimensions selected. It is recommended that the medium sized charts be used to test imaging systems with sensors up to 12 MP, the large charts be used for testing of sensors above 12 MP and up to approximately 24 MP, and the extra-large charts be used for sensor sizes above 24 MP.

Paper Size (Including Margin)

  Square Dimensions
5x9 5x7
X-Small 8.5" × 15" 8.5" × 10"
Small 14" × 24" 14" × 20"
Medium 24" × 40" 24" × 34"
Large 44" × 60" 44" × 60"
X-Large 44" × 74" 44" × 64"

Active Area

The active area of the chart includes white space above and below the top and bottom distortion bars. It is slightly larger than the printed area, which is bounded by the distortion bars on top and bottom. White space is included in active area because test images of the chart must include this white space in order to enable automated processing in SFRplus software.

  Square Dimensions
5x9 5x7
X-Small 7.85" × 15" 6.75" × 10"
Small 12.5" × 24" 13.5" × 20"
Medium 22" × 39.22" 22" × 33"
Large 33" × 59" 40" × 59"
X-Large 42" × 72" 42" × 59"

Color Chart Option

Inclusion of the color chart enables testing of color accuracy. If the color option is selected, the "focus star" pattern that aides in focusing is replaced by a 20 patch color chart.

Pre-Distortion Options

Pre-distorted charts offer the ability to map the outer edges of a wide angle or fisheye lens using SFRplus.  These distortion levels are available

Level Matrix (5x7) Matrix (5x9)
No distortion [0 0] [0 0]
Distort [0.833 1.123] [0.833 1.375]
Distort+ [1.167 1.577] [1.167 1.982]
Ultradistort [1.333  2.313] [1.333 2.958]

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FAQs About  SFRPlus Test Charts

For wallpaper color consistency & quality control (including solid-color, printed, textured, and embossed wallpapers), these 3nh spectrophotometers deliver optimal performance:


1. TS8560 Benchtop (Lab & R&D – Best Accuracy)

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

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

  • Multi-apertures (Φ3/8/15/25mm) — ideal for large patterned wallpapers

  • UV control (for optical brighteners in paper)

  • Best for: Lab formulation, color standardization, batch-to-batch consistency

  • TS8560 Benchtop instrument


2. TS7700 Portable (Production & Field)

  • d/8° (SCI/SCE), ΔE*ab ≤ 0.02

  • Handheld, fast, non-destructive

  • Large aperture (Φ20mm) averages out texture/pattern unevenness

  • Best for: Production line checks, warehouse incoming inspection, on-site matching

  • TS7700 Portable spectrophotometer instrument

3. PS2080 Portable (Textured/Patterned Wallpapers)

  • d/8°, interchangeable apertures (Φ4/8mm + 1×3mm)

  • High stability for rough/embossed surfaces

  • UV included for fluorescent inks/papers

  • Best for: Complex printed, textured, or metallic-effect wallpapers

  • PS2080 Portable spectrophotometer

4. NS800 (Cost-Effective Routine QC)

  • 45/0 geometry, ΔE*ab ≤ 0.04

  • Touchscreen, easy operation

  • Best for: Uniform solid-color wallpapers, basic production QC

  • NS800 Hand Held Spectrophotometer

Short Recommendation

  • Top lab precision: TS8560

  • Best portable production: TS7700

  • Best for textured/patterned: PS2080

  • Economical routine QC: NS800

All ensure stable, repeatable color measurement for wallpaper rolls, panels, and printed patterns.


Standard models are available in a range of sizes, starting from small desktop units which are roughly the size of 60 x 40 x 40 cm, and extending to larger units which are about 120 x 60 x 80 cm based on what you need them for.


An inappropriate viewing angle may lead to reflections or color shifts in the light. The correct angle of 45 or 0 will provide the real color of the assessment without the distraction of glare.

Yes. We can supply OEM and make customized design for any specific application. Our MOQ for OEM and ODM service is 5 pcs for one model. We can not only offer standard machines, but also customized machines. Don’t hesitate to tell us your requirement, we will try our best to meet your needs.

In a Pantone light box, the tubes last around 2000 to 3000 hours, after which the brightness and color should be assessed for replacement.

Samples should be cleaned, dried, and scratched-free to obtain consistent haze measurements.


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