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Zehntner Gloss

ZGM 1130

Touchscreen Display for all Gloss Ranges
  • Reliable and stable results
  • Easy stand-alone operation with an integrated touchscreen
  • Flexible multiple measurement modes


Stand-alone use / Coatings, plastics, and related materials. 20° (high-gloss), 60° (mid-gloss) and Haze / Calculation of reflection haze H in accordance with ASTM D4039

Easy to use glossmeter with an integrated touchscreen display that delivers stable and reliable results. Everyday.
Stable and reliable results..
Ease of use
Features single, multiple and even continuous scan gloss measurements.
Versatile measuring and data analysis software.

Swiss Made
ZGM 1130 Tech Specs
Tech Specs
PC Software
Screening Eagle Workspace

2.4” touchscreen

1 million measurements

Measurement Modes
Sensor adaption V(λ)

Measuring Geometries
1-angle: 60°
2-angle: 20°, 60°
3-angle: 20°, 60°, 85°

Measuring Range
0 - 2'000 GU

Measuring Accuracy
0 - 199.9 GU: ± 0.1 %
200 - 2'000 GU: ± 0.2 %

420 g (0.93 lbs)

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What is specular reflection or specular gloss?
A specular reflection or gloss is what you get from a polished surface or mirror. It is clear, and you can see "through" the mirror. A diffuse reflection is what you get from a white wall. The light is bounced off it, but in random directions, so you cannot see the light source in the reflection. Many surfaces will be a mix of specular and diffuse - e.g. a smooth desktop will give both kinds of reflection. A polished surface gives more specular reflection and less diffuse reflection.

What is a measurement angle?
Measurement angle refers to the angle between the incident light on a surface and the line perpendicular to the surface at the point of incidence. In specular reflection the incident and reflected angle are identical. Typically, three measurement angles (20°, 60°, and 85°) are used to cover the majority of industrial coatings applications (Figure 1). The angle is selected based on the anticipated gloss range. Some measurement instruments offer the option to measure multiple angles at the same time.

What difference in gloss units is visible to the human eye?
There are no distinct differences in gloss units for the human eye to point out between the two samples. The detectable differences depend on the gloss level of the sample e.g. 3.0 GU difference measured on a very matte surface (perhaps 5GU), would be seen by the human eye but on a higher gloss coating (perhaps 60 GU) the difference would be very difficult to notice.  For a dedicated product the tolerances have to be evaluated experimentally (by end users tests of your coatings or internal "experts"). Another good option is the use of a 20/60/85 degrees instrument, which show more equality to the gloss differences due to the three measurement angles. Experience shows that a gloss difference of 5 GU, when measured with the correct geometry is just visible to a trained observer.

How is gloss measured?
Gloss is the opti­cal proper­ty of a sur­face to reflect light into the specu­lar direction, an important appear­ance factor. The visual impres­sion of gloss is depen­dent on the individual per­ception, there­fore the gloss values are deter­mined using gloss­meter. A Glossmeter directs a light at a specific angle to the test surface and simultaneously measures the amount of (specular) reflection.

Why use a glossmeter?
A glossmeter is a precision measurement instrument. In order to determine the gloss of a surface, the glossmeter projects a beam of light at a fixed intensity and angle onto a surface and measures the amount of reflected light at an equal but opposite angle.

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Standards & Guidelines


  • Arrow, click names to download Standards & Guidelines ASTM D2457
  • Arrow, click names to download Standards & Guidelines ASTM D4039
  • Arrow, click names to download Standards & Guidelines ASTM D523
  • Arrow, click names to download Standards & Guidelines BS 3900-D6
  • Arrow, click names to download Standards & Guidelines DIN 67530
  • Arrow, click names to download Standards & Guidelines EN 13300
  • Arrow, click names to download Standards & Guidelines ISO 2813
  • Arrow, click names to download Standards & Guidelines JIS Z 8741