Gloss measuring gauges from SaluTron Messtechnik

Gloss measuring gauges

Gloss measuring gauges for precise and fast gloss measurement

The gloss meter is also called a reflectometer. It uses a light source and a lens to project parallel light onto surfaces. The receiver, consisting of a lens, aperture, and photo receiver, captures the light reflected from the surface and determines its reflection degree by illuminating the sample surface at the same angle.

Gloss defines the optical property of a surface with the ability to reflect light. When a light beam hits, for example, a layer of paint at a defined angle of incidence, most of the beam penetrates, while a certain part is reflected back. The resulting results in gloss measurement are not given in percentage but in 0 to 100 gloss units (GU).

The so-called reflectometer value refers to a polished, black glass standard and not to the amount of light irradiated. This standard has a defined refractive index of 1.567 and is set equal to 100 gloss units (GU). Mirrors, polished metal, and certain foils have a much higher refractive index than paints or the black glass standard used for calibration. With these products, immensely higher gloss values (up to 2,000 GU) can be determined using a gloss meter.

In the industry, the appearance in the form of mattness or gloss is often a decisive quality factor for products. The gloss meter is particularly used in paper manufacturing, the automotive industry, dishware manufacturing, and paint shops.

Consider the measurement geometry when selecting gloss measuring gauges

Before purchasing your new gloss meter, you should be clear about the following things:

What samples are mainly measured? Depending on the type of surface, certain measurement geometries or angles must be considered, which are crucial for accurate work.
Are the samples predominantly matt or glossy? This way, you can determine the number of required measurement angles. For cross-industry samples or different materials, multi-angle measuring devices are needed.
Where should the measurement take place? To get information about aids, especially holders for small and precise measurement spots and the question of a fixed or portable measuring device, the location of the measurement plays a crucial role.